Template:Selected anniversaries/November 25: Difference between revisions
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||1753 – Robert Townsend, American spy (d. 1838) | ||1753 – Robert Townsend, American spy (d. 1838) | ||
||1775: Gustaf Gabriel Hällström born ... was a Finnish scientist. He was active in several fields, contributing to the establishment of an astronomical observatory in Turku as well as initiating the earliest systematic meteorological observations in Finland. Pic. | |||
||Andreas Freiherr von Ettingshausen (b. 25 November 1796) was a German mathematician and physicist. Pic. | ||Andreas Freiherr von Ettingshausen (b. 25 November 1796) was a German mathematician and physicist. Pic. | ||
Revision as of 07:58, 11 August 2018
1686: Scientist and bishop Niels Steensen dies. He questioned explanations for tear production, the idea that fossils grow in the ground.
1814: Physician and physicist Julius Robert von Mayer born. He will describe the vital chemical process now referred to as oxidation as the primary source of energy for any living creature; but his achievements will be overlooked and priority for the discovery of the mechanical equivalent of heat will be attributed to James Joule.
1840: Astronomer Caroline Herschel publishes new class of Gnomon algorithm functions which improve lens refraction in telescopes.
1841: Mathematician and logician Ernst Schröder born. His monumental Vorlesungen über die Algebra der Logik will prepare the way for the emergence of mathematical logic as a separate discipline in the twentieth century by systematizing the various systems of formal logic of the day.
1915: Albert Einstein presents the field equations of general relativity to the Prussian Academy of Sciences.
1947: Red Scare: The "Hollywood Ten" are blacklisted by Hollywood movie studios.