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Harald Sack

aviation
Hugh L. Dryden and High Speed Aerodynamics

Hugh L. Dryden and High Speed Aerodynamics

Harald Sack
On July 2, 1898, physicist and deputy administrator of the National Aeronautics and Space Administration Hugh Latimer Dryden was born. Dryden made pioneering studies in the aerodynamics of high speed and some of the earliest studies of air flow around wing surfaces at the speed of sound. “I believe as a matter of faith that the extension of space travel to the limits of the solar system will probably be accomplished in several…
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botany
Joseph Dalton Hooker – the Founder of Geographical Botany

Joseph Dalton Hooker – the Founder of Geographical Botany

Harald Sack
On June 30, 1817, Sir Joseph Dalton Hooker was born, one of the greatest British botanists and explorers of the 19th century. Hooker was a founder of geographical botany and Charles Darwin‘s [4] closest friend. Furthermore, he was assistant on Sir James Ross‘s [3] Antarctic expedition and whose botanical travels to foreign lands included India, Palestine and the U.S., from which he became a leading taxonomists in his time. “All I ever…
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chemistry
Emil Erlenmeyer and the Erlenmeyer Flask

Emil Erlenmeyer and the Erlenmeyer Flask

Harald Sack
On June 28, 1825, German chemist Emil Erlenmeyer was born. Erlenmeyer is known for contributing to the early development of the theory of structure, formulating the Erlenmeyer rule, and especially for designing the Erlenmeyer flask, a type of chemical flask, which is named after him. Actually, I remember the Erlenmeyer flask from my earliest chemistry lessons back in high school. So, who was the man behind that prominent gadget? Emil Erlenmeyer –…
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aviation
The Aircraft Designs of Willy Messerschmitt

The Aircraft Designs of Willy Messerschmitt

Harald Sack
On June 26, 1898, German aircraft designer and manufacturer Wilhelm Emil “Willy” Messerschmitt was born. Probably Messerschmitt’s single most important design was the Messerschmitt Bf 109, designed in 1934 with the collaboration of Walter Rethel. The Bf 109 became the most important fighter in the Luftwaffe as Germany rearmed prior to World War II. To this day, it remains one of the most-produced warplanes in history, with some 34,000 built. Willy Messerschmitt…
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physics
Victor Hess and the Cosmic Ultra Radiation

Victor Hess and the Cosmic Ultra Radiation

Harald Sack
On June 24, 1883, Austrian-American physicist, and Nobel laureate in physics Victor Francis Hess was born. Hess shared the Nobel Prize for Physics with Carl Anderson in 1936 for his discovery of cosmic rays.[5] Victor Hess’ Youth in Austria Victor Franz Hess was born near Peggau in Styria, Austria, to Vinzenz Hess, a royal forester in Prince Louis of Oettingen-Wallerstein’s service, and his wife Serafine Edle von Grossbauer-Waldstätt. He attended secondary school…
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psychology
Franz Alexander and the Foundation of Psychosomatic Medicine

Franz Alexander and the Foundation of Psychosomatic Medicine

Harald Sack
On June 22, 1891, Hungarian-American psychoanalyst and physician Franz Alexander was born. Alexander is considered one of the founders of psychosomatic medicine and psychoanalytic criminology. He was a leader in identifying emotional tension as a significant cause of physical illness. “The patient, in order to be helped, must undergo a corrective emotional experience suitable to repair the traumatic influence of previous experiences. It is of secondary importance whether this corrective experience takes…
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art
Merz Pictures – The Collages of Kurt Schwitters

Merz Pictures – The Collages of Kurt Schwitters

Harald Sack
On June 20, 1887, German artist Kurt Hermann Eduard Karl Julius Schwitters, known as Kurt Schwitters was born. Schwitters worked in several genres and media, including Dadaism, Constructivism, Surrealism, poetry, sound, painting, sculpture, graphic design, typography, and what came to be known as installation art. He is most famous for his collages, called Merz Pictures. “My name is Schwitters, Kurt Schwitters.. .I’m a painter and I nail my pictures.. .I’d like to be…
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astronomy
Jacobus Cornelius Kapteyn and the Rotation of the Milky Way

Jacobus Cornelius Kapteyn and the Rotation of the Milky Way

Harald Sack
On June 18, 1922, Dutch astronomer Jacobus Cornelius Kapteyn passed away. Kapteyn carried out extensive studies of the Milky Way and was the discoverer of evidence for galactic rotation. He used photography and statistical methods in determining the motions and spatial distribution of stars, the first major step after the works of William and John Herschel.[6,7] Jacobus C. Kapteyn – Early Year Jacobus Cornelius Kapteyn was born on 19 January 1851 in…
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mathematics
Aryabhata and Early Indian Mathematics

Aryabhata and Early Indian Mathematics

Harald Sack
In 476 CE, Indian mathematician and astronomer Aryabhata was born. Aryabhata is the earliest Indian mathematician whose work and history are available to modern scholars. In his work “Ganita” Aryabhata names the first 10 decimal places and gives algorithms for obtaining square and cubic roots, using the decimal number system. He also came up with an approximation of pi and the area of a triangle. “Aryabhata is the master who, after reaching…
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medical science
Sir James Black and the Beta Blockers

Sir James Black and the Beta Blockers

Harald Sack
On June 14, 1924, British pharmacologist and Nobel Laureate Sir James Whyte Black was born. Black developed propranolol, a beta blocker used for the treatment of heart disease. Black was also responsible for the development of cimetidine, a H2 receptor antagonist, a drug used to treat stomach ulcers. For both developments he was awarded the 1968 Nobel Prize in Medicine. “I call myself a pharmacological toolmaker. ” — Sir James W. Black, as…
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