| Date | Text | |
|---|---|---|
23 Jul 1503
Pluto |
Pluto (astronomy) Unknown at this time, Pluto moves outside Neptune's orbit, remaining there for 233 years. |
|
23 Jul 1773
Thomas Brisbane |
birth Thomas Brisbane Thomas Brisbane, Scottish astronomer (died 1860) |
|
23 Jul 1773
George Edwards |
death George Edwards George Edwards, English naturalist (born 1693) |
|
23 Jul 1775
Étienne-Louis Malus |
birth Étienne-Louis Malus Étienne-Louis Malus, French physicist and mathematician] (died 1812) |
|
23 Jul 1788
Prideaux John Selby |
birth Prideaux John Selby Prideaux John Selby, English ornithologist (died 1867) |
|
23 Jul 1829
United States |
United States (technology) In the United States, William Burt obtains the first patent for a form of typewriter, the typographer. |
|
23 Jul 1854
Birt Acres |
birth Birt Acres Birt Acres (died 1918), American-born cinematographic inventor. |
|
23 Jul 1878
Baron Carl von Rokitansky |
death Baron Carl von Rokitansky Baron Carl von Rokitansky, Bohemian pathologist (born 1804) |
|
23 Jul 1888
Ivan Magill |
birth Ivan Magill Ivan Magill (died 1986), anaesthesiologist. |
|
23 Jul 1904
continuous track |
continuous track (technology) A continuous track tractor is patented by David Roberts of Richard Hornsby & Sons of Grantham in England. |
|
23 Jul 1909
White Star Liner |
White Star Liner (technology) White Star Liner RMS Republic (15,400 tons), sinking following a collision off Nantucket, becomes the first ship in history to issue a CQD distress signal, using Marconi wireless telegraphy. |
|
23 Jul 1912
Horace Donisthorpe |
Horace Donisthorpe (biology) Horace Donisthorpe first discovers Anergates atratulus in the New Forest, England. |
|
23 Jul 1916
William Ramsay |
death William Ramsay Sir William Ramsay (born 1852), Scottish-born chemist, winner of the 1904 Nobel Prize in Chemistry. |
|
23 Jul 1923
Ulf Grenander |
birth Ulf Grenander Ulf Grenander, Swedish-born mathematician. |
OnThisDay.net