Editing 1925 in science (section)

==Technology==
* June 13 – [[Charles Francis Jenkins]] achieves the first synchronized transmission of pictures and sound, using 48 lines, and a mechanical system. A 10-minute film of a miniature windmill in motion is sent across 5 miles from [[Anacostia]] to [[Washington, DC]]. The images are viewed by representatives of the [[Bureau of Standards]], the [[U.S. Navy]], the [[United States Department of Commerce|Department of Commerce]] and others. Jenkins calls this "the first public demonstration of radiovision".
* October 2 – [[John Logie Baird]] successfully transmits the first television pictures with a greyscale image, in London.<ref>{{cite book|first=R. W.|last=Burns|title=Television: An International History of the Formative Years|location=London|publisher=Institution of Electrical Engineers|isbn=9780852969144|page=264}}</ref>
* October 22 – [[Julius Edgar Lilienfeld]] files the first [[patent]] for a form of [[field-effect transistor]].<ref>{{US patent|1745175}} ''Method and apparatus for controlling electric currents'', first filed in Canada, describing a device similar to a [[MESFET]]. Granted 28 January 1930. {{cite book|first=Thomas H.|last=Lee|title=The Design of CMOS Radio-Frequency Integrated Circuits|edition=New|publisher=Cambridge University Press|year=2004|isbn=9780521835398|pages=167ff}}</ref>
* November 4 – [[Charles F. Brannock]] files a patent for the [[Brannock Device]] for measuring shoe sizes.<ref>"Foot-Measuring Instrument." [https://patents.google.com/patent/US1682366 U.S. Patent 1,682,366.]</ref>
* ''late'' 1925 ''or early'' [[1926 in science|1926]] – [[Vladimir K. Zworykin]] demonstrates a [[cathode-ray tube]] television system using Braun tubes at the [[Westinghouse Electric (1886)|Westinghouse Electric]] laboratories in [[Pittsburgh, Pennsylvania]].
* [[Jonas Hesselman]] introduces the [[Hesselman engine]].