Template:Selected anniversaries/August 21: Difference between revisions

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||1614: Elizabeth Báthory dies ... aristocrat and serial killer. Pic.
||1614: Elizabeth Báthory dies ... aristocrat and serial killer. Pic.


File:Hubert Gautier.jpg|link=Hubert Gautier (nonfiction)|1660: Physician, mathematician, and engineer [[Hubert Gautier (nonfiction)|Hubert Gautier]] dies. He authored the first book on bridge building, ''Traité des Ponts'', in 1716, as well as books on roads, fortifications, antiquities, geology, and a first manual for watercolor practitioners.
File:Hubert Gautier.jpg|link=Hubert Gautier (nonfiction)|1660: Physician, mathematician, and engineer [[Hubert Gautier (nonfiction)|Hubert Gautier]] born. Gautier will author the first book on bridge building, ''Traité des Ponts'', in 1716, as well as books on roads, fortifications, antiquities, geology, and a first manual for watercolor practitioners.


||1665: Giacomo F. Maraldi born ... astronomer and mathematician. ... discovery ... the ice caps on Mars are not exactly on the rotational poles of that body. Maraldi is also credited for the first observation (1723) of what is usually referred to as Poisson's spot, an observation that was unrecognized until its rediscovery in the early 19th century by Dominique Arago. At the time of Arago's discovery, Poisson's spot gave convincing evidence for the contested wave nature of light. No pic online: https://www.google.com/search?q=Giacomo+F.+Maraldi
||1665: Giacomo F. Maraldi born ... astronomer and mathematician. ... discovery ... the ice caps on Mars are not exactly on the rotational poles of that body. Maraldi is also credited for the first observation (1723) of what is usually referred to as Poisson's spot, an observation that was unrecognized until its rediscovery in the early 19th century by Dominique Arago. At the time of Arago's discovery, Poisson's spot gave convincing evidence for the contested wave nature of light. No pic online: https://www.google.com/search?q=Giacomo+F.+Maraldi

Revision as of 01:09, 20 August 2020