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Harald Sack

psychology
Frederic Bartlett and Experimental Psychology

Frederic Bartlett and Experimental Psychology

Harald Sack
On October 20, 1886, British psychologist Sir Frederic Charles Bartlett was born. Bartlett is known as Britain‘s most outstanding cognitive psychologist between the World Wars. He was one of the forerunners of cognitive psychology. Bartlett considered most of his own work on cognitive psychology to be a study in social psychology, but he was also interested in anthropology, moral science, philosophy, and sociology. Frederic Bartlett – Early Years Frederic Bartlett was born…
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physics
Pascual Jordan and Quantum Mechanics

Pascual Jordan and Quantum Mechanics

Harald Sack
On October 18, 1902, theoretical and mathematical physicist Pascual Jordan was born. Jordan made significant contributions to quantum mechanics and quantum field theory. He contributed much to the mathematical form of matrix mechanics, and developed canonical anticommutation relations for fermions. Pascual Jordan – Early Years Pascual Jordan was born in Hanover, Kingdom of Prussia, German Empire, as son of Ernst Pasqual Jordan (1858-1924), a painter of landscapes and portraits, and Eva Fischer.…
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art
Lucas Cranach the Elder – the “fastest Painter”

Lucas Cranach the Elder – the “fastest Painter”

Harald Sack
On October 16, 1553, German Renaissance painter and printmaker in woodcut and engraving Lucas Cranach the Elder passed away. Cranach is known for his portraits, both of German princes and those of the leaders of the Protestant Reformation, whose cause he embraced with enthusiasm, becoming a close friend of Martin Luther. Lucas Cranach the Elder has been considered the most successful German artist of his time. Youth and Apprenticeship Lucas Cranach was born…
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physics
Ernest Walton and the Particle Accelerator

Ernest Walton and the Particle Accelerator

Harald Sack
On October 6, 1903, Irish physicist and Nobel laureate Ernest Walton was born. Walton received the Nobel Prize in Physics for his work together with John Cockcroft with “atom-smashing” experiments done at Cambridge University in the early 1930s, and so became the first person in history to artificially split the atom. “A linear accelerator has the advantage that no magnet is required and that its cost should not rise much more steeply…
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biology
Christian de Duve and the Cell Organelles

Christian de Duve and the Cell Organelles

Harald Sack
On October 2, 1917, Belgian cytologist, biochemist and Nobel Laureate Christian de Duve was born. Duve made serendipitous discoveries of two cell organelles, peroxisome and lysosome, for which he shared the Nobel Prize in Physiology or Medicine in 1974 with Albert Claude and George E. Palade. Christian de Duve – Youth and Education Christian de Duve was born as son of Belgian shopkeeper Alphonse de Duve and wife Madeleine Pungs in the…
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explorer
John Hanning Speke and the Source of the Nile

John Hanning Speke and the Source of the Nile

Harald Sack
On September 15, 1864, British explorer and army officer John Hanning Speke died by accident with a shot gun. Speke is most associated with the search for the source of the Nile and was in fact the first European that reached Lake Victoria and as such is the “discoverer of the source of the Nile“. “The expedition had now performed its functions. I saw that old father Nile without any doubt rises in…
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history
From the French Blue to the Hope Diamond

From the French Blue to the Hope Diamond

Harald Sack
On September 11, 1792, while Louis XVI and his family were imprisoned in the Temple in the early stages of the Reign of Terror during the French Revolution, a group of thieves broke into the Royal Storehouse, the Hôtel du Garde-Meuble de la Couronne, and stole most of the Crown Jewels during a five-day looting spree. Among those was also the Blue Diamond of the Crown of France, later English-speaking historians have simply called…
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computer science
John William Mauchly and the Electronic Computer

John William Mauchly and the Electronic Computer

Harald Sack
On August 30, 1907, US-American physicist John William Mauchly was born. Along with J. Presper Eckert, Mauchly designed ENIAC, the first general purpose electronic digital computer, as well as EDVAC, BINAC and UNIVAC I, the first commercial computer made in the United States. Together they started the first computer company, the Eckert-Mauchly Computer Corporation (EMCC), and pioneered fundamental computer concepts including the stored program, subroutines, and programming languages. Childhood and Education John…
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communication
Sir Rowland Hill and the Uniform Penny Post

Sir Rowland Hill and the Uniform Penny Post

Harald Sack
On August 27, 1879, English teacher, inventor and social reformer Sir Rowland Hill passed away. Hill campaigned for a comprehensive reform of the postal system, based on the concept of Uniform Penny Post and his solution of prepayment, facilitating the safe, speedy and cheap transfer of letters. Hill later served as a government postal official, and he is usually credited with originating the basic concepts of the modern postal service, including the invention…
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mathematics
Johann Heinrich Lambert – A Swiss Polymath

Johann Heinrich Lambert – A Swiss Polymath

Harald Sack
On August 26, 1728, Swiss polymath Johann Heinrich Lambert was born. Lambert provided the first rigorous proof that pi is irrational (i.e. it cannot be expressed as the quotient of two integers). He also was the first to introduce hyperbolic functions into trigonometry as well as the first mathematician to address the general properties of map projections. He also made significant contributions to physics, philosophy, and logic. “We would wish to discover the…
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