September 19th in stamps James A. Garfield, Porsche, King Carl XVI Gustaf of Sweden, Ole Rømer

Here are some events that happened on September 19th. It could be an event or a person that died or was born on that day

1710 Died: Ole Rømer, Danish astronomer and instrument maker (b. 1644)

Ole Christensen Rømer (25 September 1644 – 19 September 1710) was a Danish astronomer who, in 1676, made the first quantitative measurements of the speed of light.

Rømer also invented the modern thermometer showing the temperature between two fixed points, namely the points at which water respectively boils and freezes.

In addition to inventing the first street lights in Copenhagen, Rømer also invented the meridian circle, the altazimuth, and the passage instrument (also known as the transit instrument, a type of meridian circle whose horizontal axis is not fixed in the east-west direction).

In scientific literature, alternative spellings such as "Roemer", "Römer", or "Romer" are common.

Danish stamp depicting Ole Rømer

1881 Died: James A. Garfield, American general, lawyer, and politician, and the 20th President of the United States (b. 1831)

James Abram Garfield (November 19, 1831 – September 19, 1881) was the 20th president of the United States, serving from March 4, 1881, until his death by assassination six and a half months later. He is the only sitting member of the United States House of Representatives to be elected to the presidency.

Garfield entered politics as a Republican in 1857. He served as a member of the Ohio State Senate from 1859 to 1861. Garfield opposed Confederate secession, served as a major general in the Union Army during the American Civil War, and fought in the battles of Middle Creek, Shiloh, and Chickamauga. He was first elected to Congress in 1862 to represent Ohio's 19th district. Throughout Garfield's congressional service after the war, he firmly supported the gold standard and gained a reputation as a skilled orator. He initially agreed with Radical Republican views on Reconstruction, but later favored a moderate approach to civil rights enforcement for freedmen.

At the 1880 Republican National Convention, delegates chose Garfield, who had not sought the White House, as a compromise presidential nominee on the 36th ballot. In the 1880 presidential election, he conducted a low-key front porch campaign and narrowly defeated Democrat Winfield Scott Hancock. Garfield's accomplishments as president included a resurgence of presidential authority against senatorial courtesy in executive appointments, purging corruption in the Post Office, and appointing a U.S. Supreme Court justice. He enhanced the powers of the presidency when he defied the powerful New York senator Roscoe Conkling by appointing William H. Robertson to the lucrative post of Collector of the Port of New York, starting a fracas that ended with Robertson's confirmation and Conkling's resignation from the Senate. Garfield advocated agricultural technology, an educated electorate, and civil rights for African Americans. He also proposed substantial civil service reforms, which were passed by Congress in 1883 and signed into law by his successor, Chester A. Arthur, as the Pendleton Civil Service Reform Act.

On July 2, 1881, Charles J. Guiteau, a disappointed and delusional office seeker, shot Garfield at the Baltimore and Potomac Railroad Station in Washington D.C. The wound was not immediately fatal, but he died on September 19, 1881, from infections caused by his doctors. Guiteau was executed for Garfield's murder in June 1882.

US stamps depicting James A. Garfield

1909 Born: Ferdinand Porsche, Austrian engineer and businessman (d. 1998)

Ferdinand Porsche (3 September 1875 – 30 January 1951) was an Austrian automotive engineer and founder of the Porsche car company. He is best known for creating the first gasoline-electric hybrid vehicle (Lohner-Porsche), the Volkswagen Beetle, the Mercedes-Benz SS/SSK, several other important developments and Porsche automobiles.

An important contributor to the German war effort during World War II, Porsche was involved in the production of advanced tanks such as the VK 4501 (P), Tiger I, Tiger II, Elefant, and Panzer VIII Maus, as well as other weapon systems, including the V-1 flying bomb. Porsche was a member of the Nazi Party, and was called the "Great German Engineer" by Nazi officials. He was a recipient of the German National Prize for Art and Science, the SS-Ehrenring and the War Merit Cross.

Porsche was inducted into the International Motorsports Hall of Fame in 1996 and won the Car Engineer of the Century award in 1999

Some stamps depicting Ferdinand Porsche or the Porsche car

1973 – King Carl XVI Gustaf of Sweden has his investiture.

Carl XVI Gustaf (Carl Gustaf Folke Hubertus; born 30 April 1946) is the King of Sweden. He ascended the throne on the death of his grandfather, King Gustaf VI Adolf, on 15 September 1973.

He is the youngest child and only son of Prince Gustaf Adolf, Duke of Västerbotten, and Princess Sibylla of Saxe-Coburg and Gotha. His father died on 26 January 1947 in an airplane crash in Denmark when Carl Gustaf was nine months old. Upon his father's death, he became second in line to the throne, after his grandfather, the then Crown Prince Gustaf Adolf. Following the death of his great-grandfather King Gustaf V in 1950, Gustaf Adolf ascended the throne and thus Carl Gustaf became Sweden's new crown prince and heir apparent to the throne at the age of four.

A short while after he became king in 1973, the new 1974 Instrument of Government took effect, formally stripping Carl XVI Gustaf of even a nominal role in governmental affairs. As a result, he no longer performs many of the duties normally accorded to a head of state, such as the formal appointment of the prime minister, signing off on legislation, and being commander-in-chief of the nation's military. The new instrument explicitly limits the king to ceremonial functions and, among other things, to be regularly informed of affairs of state. As head of the House of Bernadotte Carl Gustaf has also been able to make a number of decisions about the titles and positions of its members.

The king's heir apparent, after passage on 1 January 1980 of a new law establishing absolute primogeniture (the first such law passed in Western European history), is Crown Princess Victoria, the eldest child of the King and his wife, Queen Silvia. Before the passage of that law, Crown Princess Victoria's younger brother, Prince Carl Philip, was briefly the heir apparent, as of his birth in May 1979.

Carl XVI Gustaf is the longest-reigning monarch in Swedish history, having surpassed King Magnus IV's reign of 44 years and 222 days on 26 April 2018.

Swedish stamps depicting Carl XVI Gustaf

September 18th in stamps Leonhard Euler, Oscar II, Royal Opera House in London opens, Léon Foucault

Here are some events that happened on September 18th. It could be an event or a person that died or was born on that day

1783 Died: Leonhard Euler, Swiss mathematician and physicist (b. 1707)

Leonhard Euler (15 April 1707 – 18 September 1783) was a Swiss mathematician, physicist, astronomer, geographer, logician and engineer who made important and influential discoveries in many branches of mathematics, such as infinitesimal calculus and graph theory, while also making pioneering contributions to several branches such as topology and analytic number theory. He also introduced much of the modern mathematical terminology and notation, particularly for mathematical analysis, such as the notion of a mathematical function. He is also known for his work in mechanics, fluid dynamics, optics, astronomy and music theory. 

Euler was one of the most eminent mathematicians of the 18th century and is held to be one of the greatest in history. He is also widely considered to be the most prolific, as his collected works fill 92 volumes, more than anyone else in the field. He spent most of his adult life in Saint Petersburg, Russia, and in Berlin, then the capital of Prussia.

Stamps from East Germany and Switzerland depicting Leonhard Euler

1809 – The Royal Opera House in London opens.

The Royal Opera House (ROH) is an opera house and major performing arts venue in Covent Garden, central London. The large building is often referred to as simply "Covent Garden", after a previous use of the site of the opera house's original construction in 1732. It is the home of The Royal Opera, The Royal Ballet, and the Orchestra of the Royal Opera House. Originally called the Theatre Royal, it served primarily as a playhouse for the first hundred years of its history. In 1734, the first ballet was presented. A year later, Handel's first season of operas began. Many of his operas and oratorios were specifically written for Covent Garden and had their premieres there.

The current building is the third theatre on the site following disastrous fires in 1808 and 1856. The façade, foyer, and auditorium date from 1858, but almost every other element of the present complex dates from an extensive reconstruction in the 1990s. The main auditorium seats 2,256 people, making it the third largest in London, and consists of four tiers of boxes and balconies and the amphitheatre gallery. The proscenium is 12.20 m wide and 14.80 m high. The main auditorium is a Grade I listed building.

Stamp from Great Britain depicting the Royal Opera House

1819 Born: Léon Foucault, French physicist and academic (d. 1868)

Jean Bernard Léon Foucault (18 September 1819 – 11 February 1868) was a French physicist best known for his demonstration of the Foucault pendulum, a device demonstrating the effect of the Earth's rotation. He also made an early measurement of the speed of light, discovered eddy currents, and is credited with naming the gyroscope.

Foucault died of what was probably a rapidly developing case of multiple sclerosis on 11 February 1868 in Paris and was buried in the Montmartre Cemetery.

The asteroid 5668 Foucault was named for him.[10] His is one of the 72 names inscribed on the Eiffel Tower.

1872 – King Oscar II accedes to the throne of Sweden–Norway.

Oscar II (Oscar Fredrik; 21 January 1829 – 8 December 1907) was the King of Sweden from 1872 until his death, and was also the final King of Norway from the House of Bernadotte until being deposed in 1905.

Oscar II was King during a time when both Sweden and Norway were undergoing a period of industrialization and rapid technological progress. His reign also saw the gradual decline of the Union of Sweden and Norway, which culminated in its dissolution in 1905. He was subsequently succeeded as King of Norway by his grandnephew Prince Carl of Denmark under the regnal name Haakon VII, and as King of Sweden by his eldest son, Gustaf V.

Oscar II is the paternal great-great-grandfather of Carl XVI Gustaf, King of Sweden since 1973. Harald V, King of Norway since 1991, is a great-grandson of Oscar II, through his third son Prince Carl, Duke of Västergötland.

Swedish stamps depicting Oscar II

September 17th in stamps von Steuben, Marquis de Condorcet, Harriet Tubman escapes from slavery, Alfred de Vigny

Here are some events that happened on September 17th. It could be an event or a person that died or was born on that day

1730 Born: Friedrich Wilhelm von Steuben, Prussian-American general (d. 1794)

Friedrich Wilhelm August Heinrich Ferdinand von Steuben (born Friedrich Wilhelm Ludolf Gerhard Augustin von Steuben; September 17, 1730 – November 28, 1794), also referred to as Baron von Steuben, was a Prussian and later an American military officer. He served as Inspector General and a Major General of the Continental Army during the American Revolutionary War. He was one of the fathers of the Continental Army in teaching them the essentials of military drills, tactics, and discipline. He wrote Regulations for the Order and Discipline of the Troops of the United States, the book that served as the Army's drill manual for decades. He served as General George Washington's chief of staff in the final years of the war.

Generally, Von Steuben Day takes place in September in many cities throughout the United States. It is often considered the German-American event of the year. Participants march, dance, wear German costumes and play German music, and the event is attended by millions of people. The German-American Steuben Parade is held annually in September in New York City. It is one of the largest parades in the city and is traditionally followed by an Oktoberfest in Central Park as well as celebrations in Yorkville, Manhattan, a historically German section of New York City. The German-American Steuben Parade has been taking place since 1958. Chicago also hosts a von Steuben Day parade, which is featured in the U.S. film Ferris Bueller's Day Off. Philadelphia hosts a smaller Steuben Parade in the Northeast section of the city.

Stamps from Germany, Berlin and the US depicting von Steuben

1743 Born: Marquis de Condorcet, French mathematician and political scientist (d. 1794)

Marie Jean Antoine Nicolas de Caritat, Marquis of Condorcet (17 September 1743 – 29 March 1794), known as Nicolas de Condorcet, was a French philosopher and mathematician. His ideas, including support for a liberal economy, free and equal public instruction, constitutional government, and equal rights for women and people of all races, have been said to embody the ideals of the Age of Enlightenment and Enlightenment rationalism. He died in prison after a period of flight from French Revolutionary authorities.

French stamp depicting Marquis de Condorcet

1849 – American abolitionist Harriet Tubman escapes from slavery.

Harriet Tubman (born Araminta Ross, c. March 1822 – March 10, 1913) was an American abolitionist and political activist. Born into slavery, Tubman escaped and subsequently made some 13 missions to rescue approximately 70 enslaved people, including family and friends, using the network of antislavery activists and safe houses known as the Underground Railroad. During the American Civil War, she served as an armed scout and spy for the Union Army. In her later years, Tubman was an activist in the movement for women's suffrage.

Born enslaved in Dorchester County, Maryland, Tubman was beaten and whipped by her various masters as a child. Early in life, she suffered a traumatic head wound when an irate overseer threw a heavy metal weight intending to hit another enslaved person, but hit her instead. The injury caused dizziness, pain, and spells of hypersomnia, which occurred throughout her life. After her injury, Tubman began experiencing strange visions and vivid dreams, which she ascribed to premonitions from God. These experiences, combined with her Methodist upbringing, led her to become devoutly religious.

In 1849, Tubman escaped to Philadelphia, only to return to Maryland to rescue her family soon after. Slowly, one group at a time, she brought relatives with her out of the state, and eventually guided dozens of other enslaved people to freedom. Traveling by night and in extreme secrecy, Tubman (or "Moses", as she was called) "never lost a passenger". After the Fugitive Slave Act of 1850 was passed, she helped guide fugitives farther north into British North America (Canada), and helped newly freed enslaved people to find work. Tubman met John Brown in 1858, and helped him plan and recruit supporters for his 1859 raid on Harpers Ferry.

When the Civil War began, Tubman worked for the Union Army, first as a cook and nurse, and then as an armed scout and spy. The first woman to lead an armed expedition in the war, she guided the raid at Combahee Ferry, which liberated more than 700 enslaved people. After the war, she retired to the family home on property she had purchased in 1859 in Auburn, New York, where she cared for her aging parents. She was active in the women's suffrage movement until illness overtook her, and she had to be admitted to a home for elderly African Americans that she had helped to establish years earlier. After her death in 1913, she became an icon of courage and freedom.

Stamps from the US and Liberia depicting Harriet Tubman

1863 Died: Alfred de Vigny, French author, poet, and playwright (b. 1797)

Alfred Victor, Comte de Vigny (27 March 1797 – 17 September 1863) was a French poet and early leader of French Romanticism. He also produced novels, plays, and translations of Shakespeare.

He settled in Paris with his young English bride Lydia Bunbury, whom he married in Pau in 1825. He collected his recent works in January 1826 in Poèmes antiques et modernes. Three months later he published the first important historical novel in French, Cinq-Mars, based on the life of Louis XIII's favorite Henri Coiffier de Ruzé, Marquis of Cinq-Mars, who conspired against the Cardinal de Richelieu. With the success of these two volumes, Vigny seemed to be the rising star of the Romantic movement, though one of Vigny's best friends, Victor Hugo, soon usurped that role. Vigny wrote of Hugo: "The Victor I loved is no more... now he likes to make saucy remarks and is turning into a liberal, which does not suit him." Unlike Hugo and Alphonse de Lamartine, who moved gradually to the center and then to the left during the 1830s, Vigny remained pliantly centrist in his politics: he accepted the July monarchy, at first welcomed and then rejected the Second French Republic, and then supported Napoleon III. Vigny later denounced members of his inner circle whom he suspected of republican sympathies to the imperial police.

Although Vigny gained success as a writer, his personal life was not happy. His marriage was a disappointment; his relationship with Marie Dorval was plagued by jealousy; and his literary talent was eclipsed by the achievements of others. He grew embittered. After the death of his mother in 1838 he inherited the property of Maine-Giraud, near Angoulême, where it was said that he had withdrawn to his 'ivory tower' (an expression Sainte-Beuve coined with reference to Vigny). There Vigny wrote some of his most famous poems, including La Mort du loup and La Maison du berger. Proust regarded La Maison du berger as the greatest French poem of the 19th century. In 1845, after several unsuccessful attempts to be elected, Vigny became a member of the Académie française.

In later years, Vigny ceased to publish. He continued to write, however, and his Journal is considered by modern scholars to be a great work in its own right, though it awaits a definitive scholarly edition. Vigny considered himself a thinker as well as a literary author; he was, for example, one of the first French writers to take a serious interest in Buddhism. His own philosophy of life was pessimistic and stoical, but celebrated human fraternity, the growth of knowledge, and mutual assistanc as high values. He was the first in literary history to use the word spleen in the sense of woe, grief, gall, descriptive of the condition of the soul of modern man. In his later years he spent much time preparing the posthumous collection of poems now known as Les Destinées, for which his intended title was Poèmes philosophiques. It concludes with Vigny's final message to the world, L'Esprit pur.

French stamps depicting Alfred de Vigny

August 31st in stamps de Bougainville, Baudelaire, Wilhelmina

Here are some events that happened on August 31st. It could be an event or a person that died or was born on that day

1811 Died: Louis Antoine de Bougainville, French admiral and explorer (b. 1729)

Louis-Antoine, Comte de Bougainville (12 November 1729 – 31 August 1811) was a French admiral and explorer. A contemporary of the British explorer James Cook, he took part in the Seven Years' War in North America and the American Revolutionary War against Britain. Bougainville later gained fame for his expeditions, including circumnavigation of the globe in a scientific expedition in 1763, the first recorded settlement on the Falkland Islands, and voyages into the Pacific Ocean. Bougainville Island of Papua New Guinea as well as the Bougainvillea flower were named after him.

In 1771, Bougainville published his travel log from the expedition under the title Le voyage autour du monde, par la frégate La Boudeuse, et la flûte L'Étoile (a.k.a. Voyage autour du monde and A Voyage Around the World). The book describes the geography, biology and anthropology of Argentina (then a Spanish colony), Patagonia, Tahiti and Indonesia (then a Dutch colony). The book was a sensation, especially the description of Tahitian society. Bougainville described it as an earthly paradise where men and women lived in blissful innocence, far from the corruption of civilization.

After an interval of several years, Bougainville again accepted a naval command and saw much active service between 1779 and 1782 during the American Revolutionary War, when France was as an ally of the rebels. He played a crucial part in the French victory at the Battle of the Chesapeake, which led to the eventual defeat of Great Britain.

Returning to Paris, he was one of the founding members of the Bureau des Longitudes. In 1799, the Consul Napoleon made him a senator. He died in Paris on 31 August 1811.


Stamps from New Hebrides and New Caledonia depicting de Bougainville

1867 Died: Charles Baudelaire, French poet and critic (b. 1821)

Charles Pierre Baudelaire (9 April 1821 – 31 August 1867) was a French poet who also produced notable work as an essayist, art critic, and pioneering translator of Edgar Allan Poe.

His most famous work, a book of lyric poetry titled Les Fleurs du mal (The Flowers of Evil), expresses the changing nature of beauty in the rapidly industrializing Paris during the mid-19th century. Baudelaire's highly original style of prose-poetry influenced a whole generation of poets including Paul Verlaine, Arthur Rimbaud and Stéphane Mallarmé, among many others. He is credited with coining the term "modernity" (modernité) to designate the fleeting, ephemeral experience of life in an urban metropolis, and the responsibility of artistic expression to capture that experience.

Stamps from France and Monaco depicting Charles Baudelaire

1880 Born: Wilhelmina, queen of the Netherlands (d. 1962)

Wilhelmina (Wilhelmina Helena Pauline Maria; 31 August 1880 – 28 November 1962) was Queen of the Netherlands from 1890 until her abdication in 1948. She reigned for nearly 58 years, longer than any other Dutch monarch. Her reign saw the First and the Second world wars, the Dutch economic crisis of 1933, and the decline of the Netherlands as a major colonial power.

Wilhelmina was the only child of King William III and his second wife, Emma of Waldeck and Pyrmont. On William's death in 1890, she ascended to the throne at the age of ten under the regency of her mother. In 1901, she married Duke Henry of Mecklenburg-Schwerin, with whom she had a daughter, Juliana. Wilhelmina was generally credited with maintaining Dutch neutrality during the First World War.

Following the German invasion of the Netherlands in 1940, Wilhelmina fled to Britain and took charge of the Dutch government-in-exile. She frequently spoke to the Dutch people over radio and came to be regarded as a symbol of the Dutch resistance. She returned to the Netherlands following its liberation in 1945.

Increasingly beset by poor health after the war, Wilhelmina abdicated in September 1948 in favour of Juliana. She retired to Het Loo Palace, where she died in 1962.

Dutch, Suriname and  Netherlands Indies stamps depicting Wilhelmina

August 30th in stamps Mary Shelley, Christopher Polhem, Jacobus Henricus van 't Hoff

Here are some events that happened on August 30th. It could be an event or a person that died or was born on that day

1751 Died: Christopher Polhem, Swedish physicist and engineer (b. 1661)

Christopher Polhammar (18 December 1661 – 30 August 1751) better known as Christopher Polhem, which he took after his ennoblement in 1716, was a Swedish scientist, inventor and industrialist. He made significant contributions to the economic and industrial development of Sweden, particularly mining. He was ennobled by King Charles XII of Sweden for his contributions to Swedish technological development.

Notable accomplishments

• Founded Stjärnsunds manufakturverk in södra Dalarna during 1700.
• Reinvented the Cardan joint under the name of "Polhem knot" (Swedish: Polhemknut) independently of Gerolamo Cardano, the pioneer inventor.
• Organized machinery into a "mechanical alphabet" and provided examples of such. Of 80 models carved in wood, 32 are still in the collections of the National Museum of Science and Technology (Swedish:Tekniska Museet) in Stockholm. Another 13 models of the "mechanical alphabet" are to be found in the Falun Mining Museum, Sweden.

Swedish stamps depicting Christopher Polhem

1797 Born: Mary Shelley, English novelist and playwright (d. 1851)

Mary Wollstonecraft Shelley (30 August 1797 – 1 February 1851) was an English novelist who wrote the Gothic novel Frankenstein; or, The Modern Prometheus (1818). She also edited and promoted the works of her husband, the Romantic poet and philosopher Percy Bysshe Shelley. Her father was the political philosopher William Godwin and her mother was the philosopher and feminist Mary Wollstonecraft.

Shelley's mother died less than a month after giving birth to her. She was raised by her father who provided her with a rich if informal education, encouraging her to adhere to his own anarchist political theories. When she was four, her father married a neighbour with whom Shelley came to have a troubled relationship. 

In 1814, Shelley began a romance with one of her father's political followers, Percy Bysshe Shelley, who was already married. Together with her stepsister, Claire Clairmont, she and Percy left for France and travelled through Europe. Upon their return to England, Shelley was pregnant with Percy's child. Over the next two years, she and Percy faced ostracism, constant debt and the death of their prematurely born daughter. They married in late 1816, after the suicide of Percy Shelley's first wife, Harriet.

In 1816, the couple famously spent a summer with Lord Byron, John William Polidori and Claire Clairmont near Geneva, Switzerland, where Shelley conceived the idea for her novel Frankenstein. The Shelleys left Britain in 1818 for Italy, where their second and third children died before Shelley gave birth to her last and only surviving child, Percy Florence Shelley. In 1822, her husband drowned when his sailing boat sank during a storm near Viareggio. A year later, Shelley returned to England and from then on devoted herself to the upbringing of her son and a career as a professional author. The last decade of her life was dogged by illness, most likely caused by the brain tumour which killed her at age 53.

Until the 1970s, Shelley was known mainly for her efforts to publish her husband's works and for her novel Frankenstein, which remains widely read and has inspired many theatrical and film adaptations. Recent scholarship has yielded a more comprehensive view of Shelley's achievements. Scholars have shown increasing interest in her literary output, particularly in her novels, which include the historical novels Valperga (1823) and Perkin Warbeck (1830), the apocalyptic novel The Last Man (1826) and her final two novels, Lodore (1835) and Falkner (1837). Studies of her lesser-known works, such as the travel book Rambles in Germany and Italy (1844) and the biographical articles for Dionysius Lardner's Cabinet Cyclopaedia (1829–1846), support the growing view that Shelley remained a political radical throughout her life. Shelley's works often argue that cooperation and sympathy, particularly as practised by women in the family, were the ways to reform civil society. This view was a direct challenge to the individualistic Romantic ethos promoted by Percy Shelley and the Enlightenment political theories articulated by her father, William Godwin.

Stamps and cover from Jersey and Great Britain depicting Shelley's Frankenstein

1852 Born: Jacobus Henricus van 't Hoff, Dutch chemist and academic, Nobel Prize laureate (d. 1911)

Jacobus Henricus "Henry" van 't Hoff Jr. (30 August 1852 – 1 March 1911) was a Dutch physical chemist. A highly influential theoretical chemist of his time, Van 't Hoff was the first winner of the Nobel Prize in Chemistry. His pioneering work helped found the modern theory of chemical affinity, chemical equilibrium, chemical kinetics, and chemical thermodynamics. In his 1874 pamphlet Van 't Hoff formulated the theory of the tetrahedral carbon atom and laid the foundations of stereochemistry. In 1875, he predicted the correct structures of allenes and cumulenes as well as their axial chirality. He is also widely considered one of the founders of physical chemistry as the discipline is known today.

Van 't Hoff earned his earliest reputation in the field of organic chemistry. In 1874, he accounted for the phenomenon of optical activity by assuming that the chemical bonds between carbon atoms and their neighbors were directed towards the corners of a regular tetrahedron. This three-dimensional structure accounted for the isomers found in nature. He shares credit for this with the French chemist Joseph Le Bel, who independently came up with the same idea.

Three months before his doctoral degree was awarded, Van 't Hoff published this theory, which today is regarded as the foundation of stereochemistry, first in a Dutch pamphlet in the fall of 1874, and then in the following May in a small French book entitled La chimie dans l'espace. A German translation appeared in 1877, at a time when the only job Van 't Hoff could find was at the Veterinary School in Utrecht. In these early years his theory was largely ignored by the scientific community, and was sharply criticized by one prominent chemist.

In 1884, Van 't Hoff published his research on chemical kinetics, titled Études de Dynamique chimique ("Studies in Chemical Dynamics"), in which he described a new method for determining the order of a reaction using graphics and applied the laws of thermodynamics to chemical equilibria. He also introduced the modern concept of chemical affinity. In 1886, he showed a similarity between the behaviour of dilute solutions and gases. In 1887, he and German chemist Wilhelm Ostwald founded an influential scientific magazine named Zeitschrift für physikalische Chemie ("Journal of Physical Chemistry"). He worked on Svante Arrhenius's theory of the dissociation of electrolytes and in 1889 provided physical justification for the Arrhenius equation. In 1896, he became a professor at the Prussian Academy of Sciences in Berlin. His studies of the salt deposits at Stassfurt were an important contribution to Prussia's chemical industry.

Van 't Hoff became a lecturer in chemistry and physics at the Veterinary College in Utrecht. He then worked as a professor of chemistry, mineralogy, and geology at the University of Amsterdam for almost 18 years before eventually becoming the chairman of the chemistry department. In 1896, Van 't Hoff moved to Germany, where he finished his career at the University of Berlin in 1911. In 1901, he received the first Nobel Prize in Chemistry for his work with solutions. His work showed that very dilute solutions follow mathematical laws that closely resemble the laws describing the behavior of gases.

Stamps from Grenada and the Netherlands depicting Jacobus Henricus van 't Hoff

August 29th in stamps Michael Faraday discovers electromagnetic induction, Maurice Maeterlinck, Reitwagen patented

Here are some events that happened on August 29th. It could be an event or a person that died or was born on that day

1831 – Michael Faraday discovers electromagnetic induction.

Michael Faraday (22 September 1791 – 25 August 1867) was an English scientist who contributed to the study of electromagnetism and electrochemistry. His main discoveries include the principles underlying electromagnetic induction, diamagnetism and electrolysis.

Although Faraday received little formal education, he was one of the most influential scientists in history. It was by his research on the magnetic field around a conductor carrying a direct current that Faraday established the basis for the concept of the electromagnetic field in physics. Faraday also established that magnetism could affect rays of light and that there was an underlying relationship between the two phenomena. He similarly discovered the principles of electromagnetic induction and diamagnetism, and the laws of electrolysis. His inventions of electromagnetic rotary devices formed the foundation of electric motor technology, and it was largely due to his efforts that electricity became practical for use in technology.

As a chemist, Faraday discovered benzene, investigated the clathrate hydrate of chlorine, invented an early form of the Bunsen burner and the system of oxidation numbers, and popularised terminology such as "anode", "cathode", "electrode" and "ion". Faraday ultimately became the first and foremost Fullerian Professor of Chemistry at the Royal Institution, a lifetime position.

Faraday was an excellent experimentalist who conveyed his ideas in clear and simple language; his mathematical abilities, however, did not extend as far as trigonometry and were limited to the simplest algebra. James Clerk Maxwell took the work of Faraday and others and summarized it in a set of equations which is accepted as the basis of all modern theories of electromagnetic phenomena. On Faraday's uses of lines of force, Maxwell wrote that they show Faraday "to have been in reality a mathematician of a very high order – one from whom the mathematicians of the future may derive valuable and fertile methods." The SI unit of capacitance is named in his honour: the farad.

Albert Einstein kept a picture of Faraday on his study wall, alongside pictures of Isaac Newton and James Clerk Maxwell. Physicist Ernest Rutherford stated, "When we consider the magnitude and extent of his discoveries and their influence on the progress of science and of industry, there is no honour too great to pay to the memory of Faraday, one of the greatest scientific discoverers of all time."

Stamp and First Day Cover issued by Great Britain depicting Michael Faraday 

1862 Born: Maurice Maeterlinck, Belgian poet and playwright, Nobel Prize laureate (d. 1949)

Maurice Polydore Marie Bernard Maeterlinck (29 August 1862 – 6 May 1949), also known as Count (or Comte) Maeterlinck from 1932, was a Belgian playwright, poet, and essayist who was Flemish but wrote in French. He was awarded the Nobel Prize in Literature in 1911 "in appreciation of his many-sided literary activities, and especially of his dramatic works, which are distinguished by a wealth of imagination and by a poetic fancy, which reveals, sometimes in the guise of a fairy tale, a deep inspiration, while in a mysterious way they appeal to the readers' own feelings and stimulate their imaginations". The main themes in his work are death and the meaning of life. He was a leading member of La Jeune Belgique group and his plays form an important part of the Symbolist movement.

Swedish stamp depicting Maurice Maeterlinck

1885 – Gottlieb Daimler patents the world's first internal combustion motorcycle, the Reitwagen.

Gottlieb Wilhelm Daimler 17 March 1834 – 6 March 1900) was an engineer, industrial designer and industrialist born in Schorndorf (Kingdom of Württemberg, a federal state of the German Confederation), in what is now Germany. He was a pioneer of internal-combustion engines and automobile development. He invented the high-speed liquid petroleum-fuelled engine.

Daimler and his lifelong business partner Wilhelm Maybach were two inventors whose goal was to create small, high-speed engines to be mounted in any kind of locomotion device. In 1883 they designed a horizontal cylinder layout compressed charge liquid petroleum engine that fulfilled Daimler's desire for a high speed engine which could be throttled, making it useful in transportation applications. This engine was called Daimler's Dream.

In 1885 they designed a vertical cylinder version of this engine which they subsequently fitted to a two-wheeler, the first internal combustion motorcycle which was named the Petroleum Reitwagen (Riding Car) and, in the next year, to a coach, and a boat. Daimler called this engine the grandfather clock engine (Standuhr) because of its resemblance to a large pendulum clock.

In 1890, they converted their partnership into a stock company Daimler Motoren Gesellschaft (DMG, in English—Daimler Motors Corporation). They sold their first automobile in 1892. Daimler fell ill and took a break from the business. Upon his return he experienced difficulty with the other stockholders that led to his resignation in 1893. This was reversed in 1894. Maybach resigned at the same time, and also returned. In 1900 Daimler died and Wilhelm Maybach quit DMG in 1907.

German and Hungarian stamps depicting Gottlieb Daimler or his cars

August 28th in stamps Hugo Grotius, Johann Wolfgang von Goethe, Boris III of Bulgaria

Here are some events that happened on August 28th. It could be an event or a person that died or was born on that day

1645 Born: Hugo Grotius, Dutch playwright, philosopher, and jurist (b. 1583)

Hugo Grotius (10 April 1583 – 28 August 1645), also known as Huig de Groot or Hugo de Groot, was a Dutch humanist, diplomat, lawyer, theologian and jurist.

A teenage intellectual prodigy, he was born in Delft and studied at Leiden University. He was imprisoned for his involvement in the intra-Calvinist disputes of the Dutch Republic, but escaped hidden in a chest of books. Grotius wrote most of his major works in exile in France.

Hugo Grotius was a major figure in the fields of philosophy, political theory and law during the sixteenth and seventeenth century. Along with the earlier works of Francisco de Vitoria and Alberico Gentili, he laid the foundations for international law, based on natural law in its Protestant side. Two of his books have had a lasting impact in the field of international law: De jure belli ac pacis [On the Law of War and Peace] dedicated to Louis XIII of France and the Mare Liberum [The Free Seas]. Grotius has also contributed significantly to the evolution of the notion of rights. Before him, rights were above all perceived as attached to objects; after him, they are seen as belonging to persons, as the expression of an ability to act or as a means of realizing something.

It is thought that Hugo Grotius was not the first to formulate the international society doctrine, but he was one of the first to define expressly the idea of one society of states, governed not by force or warfare but by actual laws and mutual agreement to enforce those laws. As Hedley Bull declared in 1990: "The idea of international society which Grotius propounded was given concrete expression in the Peace of Westphalia, and Grotius may be considered the intellectual father of this first general peace settlement of modern times." Additionally, his contributions to Arminian theology helped provide the seeds for later Arminian-based movements, such as Methodism and Pentecostalism; Grotius is acknowledged as a significant figure in the Arminian-Calvinist debate. Because of his theological underpinning of free trade, he is also considered an "economic theologist". 

Grotius was also a playwright, and poet. His thinking returned to the forefront after the First World War.

Stamps from the Netherlands and France depicting Hugo de Groot

1749 Born: Johann Wolfgang von Goethe, German novelist, poet, playwright, and diplomat (d. 1832)

Johann Wolfgang von Goethe (28 August 1749 – 22 March 1832) was a German writer and statesman. His works include: four novels; epic and lyric poetry; prose and verse dramas; memoirs; an autobiography; literary and aesthetic criticism; and treatises on botany, anatomy, and colour. In addition, numerous literary and scientific fragments, more than 10,000 letters, and nearly 3,000 drawings by him have survived. He is considered the greatest German literary figure of the modern era. 

A literary celebrity by the age of 25, Goethe was ennobled by the Duke of Saxe-Weimar, Karl August, in 1782 after taking up residence in Weimar in November 1775 following the success of his first novel, The Sorrows of Young Werther (1774). He was an early participant in the Sturm und Drang literary movement. During his first ten years in Weimar, Goethe became a member of the Duke's privy council, sat on the war and highway commissions, oversaw the reopening of silver mines in nearby Ilmenau, and implemented a series of administrative reforms at the University of Jena. He also contributed to the planning of Weimar's botanical park and the rebuilding of its Ducal Palace. 

Goethe's first major scientific work, the Metamorphosis of Plants, was published after he returned from a 1788 tour of Italy. In 1791 he was made managing director of the theatre at Weimar, and in 1794 he began a friendship with the dramatist, historian, and philosopher Friedrich Schiller, whose plays he premiered until Schiller's death in 1805. During this period Goethe published his second novel, Wilhelm Meister's Apprenticeship; the verse epic Hermann and Dorothea, and, in 1808, the first part of his most celebrated drama, Faust. His conversations and various shared undertakings throughout the 1790s with Schiller, Johann Gottlieb Fichte, Johann Gottfried Herder, Alexander von Humboldt, Wilhelm von Humboldt, and August and Friedrich Schlegel have come to be collectively termed Weimar Classicism.

The German philosopher Arthur Schopenhauer named Wilhelm Meister's Apprenticeship one of the four greatest novels ever written, while the American philosopher and essayist Ralph Waldo Emerson selected Goethe as one of six "representative men" in his work of the same name (along with Plato, Emanuel Swedenborg, Montaigne, Napoleon, and Shakespeare). Goethe's comments and observations form the basis of several biographical works, notably Johann Peter Eckermann's Conversations with Goethe (1836).

German stamps depicting Goethe 

1943 Died: Boris III of Bulgaria (b. 1894)

Boris III (30 January 1894 – 28 August 1943), originally Boris Klemens Robert Maria Pius Ludwig Stanislaus Xaver (Boris Clement Robert Mary Pius Louis Stanislaus Xavier), was the Tsar of the Kingdom of Bulgaria from 1918 until his death.

The eldest son of Ferdinand I, Boris acceded to the throne upon the abdication of his father, following Bulgaria's defeat during World War I. This was the country's second major defeat in only five years, after the disastrous Second Balkan War of 1913. Under the Treaty of Neuilly, Bulgaria was forced to cede new territories and pay crippling reparations to its neighbours, thereby threatening political and economic stability. Two political forces, the Agrarian Union and the Communist Party, were calling for the overthrowing of the monarchy and the change of the government. It was in these circumstances that Boris succeeded to the throne.


Some stamps issued by Bulgaria depicting King Boris III