Editing 1901 in science (section)

==Physiology and medicine==
* November 25 – [[Auguste Deter]] is first examined by Dr [[Alois Alzheimer]] in [[Frankfurt|Frankfort]] leading to a diagnosis of the [[Alzheimer's disease|condition that will carry Alzheimer's name]].<ref>{{cite web|url=http://www.whonamedit.com/doctor.cfm/177.html|title=Alois Alzheimer|work=[[Who Named It?|Whonamedit?]]|accessdate=2011-10-21}}</ref>
* [[Takamine Jōkichi|Jōkichi Takamine]] isolates and names [[adrenaline]] from mammalian organs.<ref>{{cite journal|last=Takamine|first=J.|title=The isolation of the active principle of the suprarenal gland|work=The Journal of Physiology|publisher=Cambridge University Press|year=1901|pages=xxix-xxx|volume=27|doi=10.1113/jphysiol.1902.sp000893|url=https://books.google.com/books?id=xVEq06Ym6qcC&pg=RA1-PR29#PRA1-PR29,M1|pmc=1403136}} See also ''American Journal of Pharmacy'' '''73''' (1901):525.</ref>
* [[Ivan Pavlov]] develops the theory of the "[[Classical conditioning|conditional reflex]]".<ref>{{cite book|last=Todes|first=Daniel Philip|title=Pavlov's Physiology Factory|publisher=Johns Hopkins University Press|year=2002|location=Baltimore|pages=232 ''et seq''|isbn=0-8018-6690-1}}</ref>
* [[Georg Kelling]] of [[Dresden]] performs the first "coelioscopy" ([[laparoscopic surgery]]), on a dog.<ref>{{cite journal|title=Georg Kelling (1866-1945): the root of modern day minimal invasive surgery. A forgotten legend?|author=Schollmeyer, Thoralf|journal=Archives of Gynecology and Obstetrics|date=November 2007|volume=276|issue=5|pages=505–9|doi=10.1007/s00404-007-0372-y|pmid=17458553|display-authors=etal}}</ref>
* [[William C. Gorgas]] controls the spread of [[yellow fever]] in [[Cuba]] by a [[mosquito]] eradication program.<ref>{{cite book|page=474|first=Roy|last=Porter|authorlink=Roy Porter|title=The Greatest Benefit to Mankind: a medical history of humanity from antiquity to the present|location=London|publisher=HarperCollins|year=1997|isbn=0-00-215173-1}}</ref>
* Scottish military doctor [[William Boog Leishman]] identifies organisms from the spleen of a patient who had died from "[[Dum Dum]] fever" (later known as [[leishmaniasis]]) and proposes them to be [[trypanosomes]], found for the first time in India.<ref>{{cite journal|last=Leishman|first=W. B.|year=1903|title=On the possibility of the occurrence of trypanomiasis in India|journal=[[BMJ|The British Medical Journal]]}}</ref>
* An improved [[sphygmomanometer]], for the measurement of [[blood pressure]], is invented and popularized by [[Harvey Williams Cushing|Harvey Cushing]].
* [[Karl Landsteiner]] discovers the existence of different human [[blood type]]s
* German [[Oscar Troplowitz]] invents for [[Beiersdorf]] the medical plaster patch 'Leukoplast'.