1913 in science

• February 9 – Meteor procession of February 9, 1913 visible along a great circle arc 6,{{convert|040|miles|km|round=5}} across the Americas. Astronomer Clarence Chant concludes that the source was a small, short-lived natural satellite of the Earth.{{cite journal|last=Chant|first=C.|bibcode=1913JRASC...7..145C|title=An Extraordinary Meteoric Display|journal=Journal of the Royal Astronomical Society of Canada|volume=7|year=1913|pages=145–19}}{{cite journal|last=O'Keefe|first=J. A.|url=https://adsabs.harvard.edu/full/1991LPI....22..995O|title=The Cyrillid Shower: Remnant of a Circumterrestrial Ring?|journal=Abstracts of the Lunar and Planetary Science Conference|volume=22|year=1991|page=995|bibcode=1991LPI....22..995O}}
• Berlin Observatory moves to Babelsberg.

• William Temple Hornaday publishes [https://archive.org/details/ourvanishingwild00horn Our Vanishing Wild Life: Its Extermination and Preservation].

• February – Daniel J. O'Conor and Herbert A. Faber file for a United States patent on the composite plastic laminate Formica.{{cite web|url=http://www.formica.com/ContentPage.aspx?code=PAG_OURLEGACY_EARLYYEARS |title=Our Legacy – Early Years |publisher=Formica Corporation |accessdate=2012-06-08 |url-status=dead |archiveurl=https://web.archive.org/web/20110324075223/http://www.formica.com/ContentPage.aspx?code=PAG_OURLEGACY_EARLYYEARS |archivedate=2011-03-24 }}
• Elmer McCollum and Marguerite Davis at the University of Wisconsin–Madison, and Lafayette Mendel and Thomas Burr Osborne at Yale University independently discover Vitamin A.Original papers published in Journal of Biological Chemistry. {{cite journal|url=http://www.clinchem.org/content/43/4/680.full|title=Vitamine—vitamin: The early years of discovery|author=Rosenfeld, Louis|journal=Clinical Chemistry|date=April 1997|volume=43|issue=4|pages=680–685|publisher=American Association for Clinical Chemistry|access-date=2016-07-24|archive-url=https://web.archive.org/web/20160604072512/http://www.clinchem.org/content/43/4/680.full|archive-date=2016-06-04|url-status=dead|doi=10.1093/clinchem/43.4.680|doi-access=free|pmid=9105273}}
• Protactinium is first identified by Oswald Helmuth Göhring and Kasimir Fajans.
• Henry Moseley shows that nuclear charge is the real basis for numbering the elements and discovers a systematic relation between wavelength and atomic number by using x-ray spectra obtained by diffraction in crystals.{{cite web|last=Weisstein|first=Eric W.|title=Moseley, Henry (1887–1915)|work=Eric Weisstein's World of Scientific Biography|publisher=Wolfram Research Products|year=1996|url=https://scienceworld.wolfram.com/biography/Moseley.html|accessdate=2007-03-25}} Frederick Soddy proposes that isotopes (a term suggested by Margaret Todd which he introduces) may have differing atomic weights{{cite web|title=Frederick Soddy: The Nobel Prize in Chemistry 1921|work=Nobel Lectures, Chemistry 1901–1921|publisher=Elsevier|year=1966|url=https://nobelprize.org/nobel_prizes/chemistry/laureates/1921/soddy-bio.html|accessdate=2007-03-25}} while he and Fajams independently propose the radioactive displacement law of Fajans and Soddy.{{cite journal|first=Kasimir|last=Fajans|year=1913|title=Über eine Beziehung zwischen der Art einer radioaktiven Umwandlung und dem elektrochemischen Verhalten der betreffenden Radioelemente|trans-title=On a relation between the type of radioactive transformation and the electrochemical behavior of the relevant radioactive elements|journal=Physikalische Zeitschrift|volume=14|pages=131–136}}
• J. J. Thomson shows that charged subatomic particles can be separated by their mass-to-charge ratio, the technique known as mass spectrometry.{{cite web|title=Early Mass Spectrometry |work=A History of Mass Spectrometry |publisher=Scripps Center for Mass Spectrometry |year=2005 |url=http://masspec.scripps.edu/MSHistory/timelines/1897.php |accessdate=2007-03-26 |archiveurl=https://web.archive.org/web/20070303134854/http://masspec.scripps.edu/MSHistory/timelines/1897.php |archivedate=2007-03-03 |url-status=dead }}
• The Bergius process is first developed and patented by German chemist Friedrich Bergius.

• Charles Fabry and Henri Buisson discover the ozone layer.

• Albert A. Michelson measures tides in the solid body of the Earth

• March – First publication of Isis, the journal of the history of science edited by George Sarton, in Ghent.
• Pierre Duhem begins publication of Le Système du Monde: Histoire des Doctrines cosmologiques de Platon à Copernic in Paris.

• March 6 – First publication of Ludwig Wittgenstein's philosophy of mathematics, a polemical review of Peter Coffey's The Science of Logic{{cite journal|title=Review|url=http://fair-use.org/the-cambridge-review/1913/03/06/reviews/the-science-of-logic|journal=The Cambridge Review|volume=34|issue=853|page=351|access-date=2016-11-06|archive-date=2006-04-30|archive-url=https://web.archive.org/web/20060430185008/http://fair-use.org/the-cambridge-review/1913/03/06/reviews/the-science-of-logic|url-status=dead}} written in 1912 when Wittgenstein was an undergraduate studying with Bertrand Russell.
• Publication of the 3rd volume of Principia Mathematica by Alfred North Whitehead and Bertrand Russell, one of the most important and seminal works in mathematical logic and philosophy.
• Émile Borel first states the infinite monkey theorem in the way it will subsequently become known.{{cite journal|first=Émile|last=Borel|title=Mécanique statistique et irréversibilité|journal=Journal de Physique|series=5e série|volume=3|year=1913|pages=189–196}}

• William Henry Bragg and William Lawrence Bragg work out the Bragg condition for strong X-ray reflection.
• Niels Bohr presents his quantum model of the atom.{{cite journal|url=http://web.ihep.su/dbserv/compas/src/bohr13/eng.pdf|title=On the Constitution of Atoms and Molecules|first=N.|last=Bohr|journal=Philosophical Magazine |series=Series 6|location=London|volume=26|year=1913|issue=151|pages=1–25|accessdate=2012-01-24|doi=10.1080/14786441308634955|bibcode=1913PMag...26....1B}}{{cite journal|url=http://web.ihep.su/dbserv/compas/src/bohr13b/eng.pdf|title=Part II – Systems containing only a Single Nucleus|first=N.|last=Bohr|journal=Philosophical Magazine|volume=26|year=1913|pages=476–502|doi=10.1080/14786441308634993|accessdate=2012-01-24|bibcode=1913PMag...26..476B}}{{cite web|title=Niels Bohr: The Nobel Prize in Physics 1922|work=Nobel Lectures, Chemistry 1922–1941|publisher=Elsevier|year=1966|url=https://nobelprize.org/nobel_prizes/physics/laureates/1922/bohr-bio.html|accessdate=2007-03-25}}
• William Crookes creates sunglass lenses.
• Robert Millikan measures the fundamental unit of electric charge.
• Georges Sagnac demonstrates the Sagnac effect, showing that light propagates at a speed independent of the speed of its source.{{cite journal|last=Sagnac|first=Georges|year=1913|title=The demonstration of the luminiferous aether by an interferometer in uniform rotation|journal=Comptes rendus de l'Académie des sciences|volume=157|pages=708–710}}{{cite journal|last=Sagnac|first=Georges|year=1913|title=On the proof of the reality of the luminiferous aether by the experiment with a rotating interferometer|journal=Comptes rendus|volume=157|pages=1410–1413}}{{cite journal|last=Quintin|first=M.|title=Qui a découvert la fluorescence X ?|journal=Journal de Physique IV|year=1996|volume=6|issue=4|url=http://jp4.journaldephysique.org/index.php?option=com_article&access=standard&Itemid=129&url=/articles/jp4/abs/1996/04/jp4199606C456/jp4199606C456.html|accessdate=2012-06-21}}
• Johannes Stark demonstrates that strong electric fields will split the Balmer spectral line series of hydrogen.

• Nikolay Anichkov first demonstrates the significance and role of cholesterol in atherosclerosis pathogenesis.{{cite journal|title=On experimental cholesterin steatosis and its significance in the origin of some pathological processes|url=http://atvb.ahajournals.org/content/3/2/178.long|first1=N.|last1=Anitschkow|first2=S.|last2=Chalatow|journal=Arteriosclerosis, Thrombosis, and Vascular Biology|year=1983|volume=3|pages=178–182|doi=10.1161/01.ATV.3.2.178 |doi-access=free|url-access=subscription}} Originally published 1913 in Centralblatt für allgemeine Pathologie und pathologische Anatomie (in German) XXIV, page 1-9
• Albert Schweitzer sets up the Albert Schweitzer Hospital at Lambaréné in French Equatorial Africa.

• John B. Watson publishes the article [https://psychclassics.yorku.ca/Watson/views.htm "Psychology as the Behaviorist Views It"] — sometimes called "The Behaviorist Manifesto".Psychological Review 20: pp. 158-177.

• April 29 – Swedish American engineer Gideon Sundback of Hoboken, New Jersey, patents the all-purpose zipper.
• May 26 (May 13 O.S.) – Igor Sikorsky flies the world's first 4-engine fixed-wing aircraft, his Bolshoi Baltisky biplane, near Saint Petersburg.{{cite book|url=https://books.google.com/books?id=eE-trX3XZawC&q=Bolshoi+Baltisky&pg=PA27|title=The Sikorsky Legacy|page=27|first=Sergei I.|last=Sikorsky|publisher=Arcadia Publishing|location=Charleston, South Carolina|year=2007|isbn=978-0-7385-4995-8|accessdate=2012-05-12}}{{cite book|chapter=Sikorsky, Igor|title=Encyclopedia of World Scientists|editor=Oakes, Elizabeth H.|edition=Rev.|publisher=Infobase Publishing|year=2007|page=667}}
• August – Invention of stainless steel by Harry Brearley in Sheffield, England (concurrent with the invention of another type in the United States by Elwood Haynes).{{cite book|title=Penguin Pocket On This Day|publisher=Penguin Reference Library|isbn=0-14-102715-0|year=2006|pages=94}}
• Oskar Barnack of Leitz produces the first 35 mm film miniature still camera.
• The Kaplan turbine is invented by Viktor Kaplan.{{cite news|url=https://nla.gov.au/nla.news-article230792075|title=New Austrian Stamps|newspaper=The Sun|issue=1765|location=Sydney|date=24 January 1937|access-date=10 March 2017|page=13|via=National Library of Australia}}
• French inventor René Lorin patents the ramjet, but attempts to build a prototype fail due to inadequate materials.{{cite book|last1=Zucker|first1=Robert D.|first2=Oscar|last2=Biblarz|title=Fundamentals of Gas Dynamics|publisher=Wiley|year=2002|isbn=0-471-05967-6}}

• Die Naturwissenschaften first published by Die Kaiser-Wilhelm-Gesellschaft zur Förderung der Wissenschaften e. V.
• Journal of Ecology first published.

• Nobel Prize
• Physics – Heike Kamerlingh Onnes
• Chemistry – Alfred Werner
• Medicine – Charles Richet

• January 31 – Murray Bowen (died 1990), American psychiatrist and pioneer of family therapy.
• February 28 – David Hawkins (died 2002), American philosopher of science and mathematics and science educator.
• March 2 – Georgy Flyorov (died 1990), Russian physicist who is known for his discovery of the spontaneous fission.
• March 26 – Paul Erdős (died 1996), Hungarian mathematician.{{cite web|title=Paul Erdős – Hungarian mathematician|url=https://www.britannica.com/biography/Paul-Erdos|website=Encyclopædia Britannica|accessdate=21 February 2018}}
• April 20 – Willi Hennig (died 1976), German entomologist and pioneer of cladistics.
• April 30 – Genevieve Grotjan Feinstein (died 2006), American mathematician and cryptanalyst.
• May 13 – Erich Lackner (died 1992), Austrian-born German civil engineer.
• June 10 – Edward Abraham (died 1999), English biochemist.
• August 20 – Roger Wolcott Sperry (died 1994), American neuropsychologist, neurobiologist and Nobel laureate.
• August 22 – Bruno Pontecorvo (died 1993), Italian-born physicist.
• October 10 – Remy Chauvin (died 2009), French biologist and entomologist.
• November 12 – Joel Elkes (died 2015), Königsberg-born pharmacologist.

• January 2 – Léon Teisserenc de Bort (born 1855), French meteorologist.
• January 18 – George Alexander Gibson (born 1854), Scottish physician and geologist.
• February 20 – Robert von Lieben (born 1878), Austrian physicist.
• April 14 – Carl Hagenbeck (born 1844), German zoologist.
• April 26 – Sigismond Jaccoud (born 1830), Swiss-born French physician.
• May 28 – John Lubbock (born 1834), English naturalist and archaeologist.
• August 3 – Josephine Cochrane (born 1839), American inventor of the first commercially successful dishwasher.
• September 29 – Rudolf Diesel (born 1858), German mechanical engineer (lost overboard this night).
• November 7 – Alfred Russel Wallace (born 1823), British biologist.

{{reflist}}

Category:20th century in science

Category:1910s in science