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Science on the 30th of November 1930 in history

Science

Date	Type	Text
30 Nov 1930 Bernard Lyot	science	Bernard Lyot (astronomy) French astronomer Bernard Lyot invents the coronagraph.	0
30 Nov 1930 Erich Hückel	science	Erich Hückel (chemistry) Erich Hückel proposes Hückel's rule, which explains when a planar ring molecule will have aromatic properties.	0
30 Nov 1930 Harold Urey	science	Harold Urey (chemistry) Harold Urey and associates at Columbia University demonstrate the existence of heavy water.	0
30 Nov 1930 Het Nederlandsch Historisch Natuurwetenschappelijk Museum	science	Het Nederlandsch Historisch Natuurwetenschappelijk Museum (history of science) Het Nederlandsch Historisch Natuurwetenschappelijk Museum ("The Dutch Historical Museum of the Natural Sciences") opens in Leiden.	0
30 Nov 1930 Adolf Butenandt	science	Adolf Butenandt (medicine) Adolf Butenandt discovered androsterone.	0
30 Nov 1930 John Haven Emerson	science	John Haven Emerson (medicine) John Haven Emerson and August Krogh introduce new forms of negative pressure ventilator.	0
30 Nov 1930 electroencephalography	science	electroencephalography (medicine) The first electroencephalography is performed by Hans Berger in Germany.	0
30 Nov 1930 Ernst Ruska	science	Ernst Ruska (physics) Ernst Ruska and Max Knoll built the first prototype electron microscope.	0
30 Nov 1930 László Bíró	science	László Bíró (technology) László Bíró first exhibits his ballpoint pen, in Budapest.	0
30 Nov 1930 George Beauchamp	science	George Beauchamp (technology) George Beauchamp invents the electric guitar.	0
30 Nov 1930 Hoover Dam	science	Hoover Dam (technology) Construction of the Hoover Dam begins on the Colorado River in the United States (chief designing engineer: John L. Savage).	0

29th November 1930 1st December 1930

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