Editing 1909 in science (section)

==Technology==
* March 18 – Einar Dessau uses a [[shortwave radio]] transmitter in Denmark.<ref>{{cite web|title=First Broadcast by Ham Radio Operator|url=https://infostory.com/2013/03/18/first-broadcast-by-ham-radio-operator-2/|work=The Story of Information|date=2013-03-18|accessdate=2019-10-17}}</ref>
* July 7 – [[General Electric]] applies to patent an electric [[toaster]] invented by Frank E. Shailor in the United States<ref>F. E. Shailor (1910-02-22) "Electric heater" {{US Patent|950058}}.</ref> and produces the GE model D-12, the first commercially successful model.<ref>{{cite web|url=http://www.toaster.org/museum.html|work=The Cyber Toaster Museum|last=Norcross|first=Eric|title=1900–1920|year=2006|publisher=The Toaster Museum Foundation|access-date=2022-11-20|url-status=dead|archive-url=https://web.archive.org/web/20080815211550/http://www.toaster.org/museum.html|archive-date=2008-08-15|via=Wayback Machine}}</ref>
* July 23 – [[White Star Line]]r [[RMS Republic (1903)|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 Company|Marconi]] [[wireless telegraphy]].<ref>{{cite web|url=https://www.pbs.org/wgbh/amex/rescue/filmmore/transcript/transcript1.html|work=The American Experience|title=Rescue at Sea|publisher=[[PBS]]|accessdate=2012-03-22|archive-date=2012-11-09|archive-url=https://web.archive.org/web/20121109192118/http://www.pbs.org/wgbh/amex/rescue/filmmore/transcript/transcript1.html|url-status=dead}}</ref><ref>{{cite book|first=William H.|last=Flayhart|title=Disaster at Sea|publisher=W. W. Norton & Company|year=2005|pages=206–210}}</ref>
* July 25 – [[Louis Bleriot]] is the first man to fly across the [[English Channel]] in a heavier-than-air craft.
* [[Kinemacolor]], the first commercial "natural color" system for [[film|movies]] is invented.
* [[Johann Stumpf (engineer)|Johann Stumpf]] popularises the [[uniflow steam engine]].<ref>{{cite book|first=H. W.|last=Dickinson|title=A Short History of the Steam Engine|publisher=Cambridge University Press|year=1938}}</ref>