Science on the 29th of April in history

Science

Date	Type	Text
29 Apr 1573 Guillaume Le Testu	science	death Guillaume Le Testu Guillaume Le Testu, French privateer, explorer and cartographer (born c. 1509) (beheaded by Spanish troops in Panama).
29 Apr 1768 Georg Brandt	science	death Georg Brandt Georg Brandt, Swedish chemist (born 1694)
29 Apr 1769 James Watt	science	James Watt (technology) James Watt is granted a British patent for "A method of lessening the consumption of steam in steam engines" – the separate condenser.
29 Apr 1854 Henri Poincaré	science	birth Henri Poincaré Henri Poincaré (died 1912), French mathematician.
29 Apr 1882 Werner von Siemens	science	Werner von Siemens (technology) Werner von Siemens demonstrates his Electromote, the first form of trolleybus, in Berlin.
29 Apr 1893 Harold Urey	science	birth Harold Urey Harold Urey (died 1981), American winner of the Nobel Prize in Chemistry.
29 Apr 1901 Hirohito	science	birth Hirohito Hirohito (died 1989), marine biologist and Emperor of Japan.
29 Apr 1913 Swedish American	science	Swedish American (technology) Swedish American engineer Gideon Sundback of Hoboken, New Jersey, patents the all-purpose zipper.
29 Apr 1927 Walter Thirring	science	birth Walter Thirring Walter Thirring (died 2014), Austrian mathematical physicist.
29 Apr 1961 World Wildlife Fund	science	World Wildlife Fund (zoology) World Wildlife Fund established.

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