Hermann von Helmholtz

Friedrich Kohlrausch and the Conductive Properties of Electrolytes

Friedrich Kohlrausch and the Conductive Properties of Electrolytes

On October 14, 1840, German physicist Friedrich Wilhelm Georg Kohlrausch was born. Kohlrausch investigated the conductive properties of electrolytes and contributed to knowledge of their behaviour. He also investigated elasticity, thermoelasticity, and thermal conduction as well as magnetic and electrical precision measurements. Youth and Education Friedrich Kohlrausch was born in Rinteln, Germany, the son of Rudolf Kohlrausch, a physicist who introduced the relaxation phenomena and used the stretched exponential function to explain relaxation…
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James Edward Keeler and the Rings of Saturn

James Edward Keeler and the Rings of Saturn

On September 10, 1857, American astronomer James Edward Keeler was born. Keeler is best known for being the astronomer who confirmed James Clerk Maxwell‘s theory that the rings of Saturn were not solid (requiring uniform rotation), but composed of meteoric particles.[3] James Edward Keeler – Early Years James Edward Keeler was born in La Salle, Illinois, to William F. Keeler, who served as a paymaster in the U.S. Navy at the time…
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Ewald Hering’s Facsinating Research in Colour Vision

Ewald Hering’s Facsinating Research in Colour Vision

On August 5, 1834, German physiologist Ewald Hering was born. Hering is best known for his research into color vision, binocular perception and eye movements. Hering challenged the color-vision theory of Hermann von Helmholtz. Visual sensations, according to Hering‘s view, were due to three color receptors responding in an “opponent” fashion in color-pairs (white/black, yellow/blue, and red/green) to take account of the after-images of colors. Philosophy, Zoology, and Medicine Ewald Hering was…
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Julius von Mayer – Energy can neither be created or destroyed

Julius von Mayer – Energy can neither be created or destroyed

On November 25, 1814, German physician and physicist Julius Robert von Mayer was born. He is best known for enunciating in 1841 one of the original statements of the conservation of energy or what is now known as one of the first versions of the first law thermodynamics, namely that “energy can be neither created nor destroyed“. “Nature has put itself the problem of how to catch in flight light streaming to the…
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Michael Pupin solving the Problems of long-distance Communication

Michael Pupin solving the Problems of long-distance Communication

On October 9, 1858, Serbian American physicist and physical chemist Michael Pupin was born, who is best known for his numerous patents, including a means of greatly extending the range of long-distance telephone communication by placing loading coils (of wire) at predetermined intervals along the transmitting wire (known as “pupinization“). “We would never get away from it. … It’s bad enough as it is, but with the wireless telephone one could be…
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