Editing 1930 in science (section)

==Medicine==
* March 5 – Danish painter Einar Wegener begins to undergo [[sexual reassignment]] surgery in Germany and takes the name [[Lili Elbe]].
* July 10 – [[Mental Treatment Act 1930]] in the United Kingdom provides for free voluntary treatment for psychiatric conditions and for psychiatric outpatient clinics, replaces the term "asylum" with "[[mental hospital]]" and reorganises the [[Board of Control for Lunacy and Mental Deficiency]].
* November 25 – Cecil George Paine, a [[pathologist]] at the [[Sheffield Royal Infirmary]] in [[England]], achieves the first recorded cure (of an eye infection) using [[penicillin]].<ref>{{cite journal|last1=Wainwright|first1=M.|last2=Swan|first2=H.T.|title=C.G. Paine and the earliest surviving clinical records of penicillin therapy|journal=Medical History|volume=30|pages=42–56|year=1986|pmid=3511336|pmc=1139580|doi=10.1017/S0025727300045026}}</ref>
* [[DPT vaccine]] (against [[diphtheria]], [[tetanus]] and [[pertussis]]) is first used.