Hoechst AG market Arsphenamine under the trade namedaggga, the first organic antisyphilitic, its properties having been discovered the previous fall by bacteriologist Sahachiro Hata during systematic testing in the laboratory of Paul Ehrlich; it rapidly becomes the world's most widely prescribed drug.[2]
May 18 – At the annual meeting of the American Association for the Study of the Feeble-Minded, Henry H. Goddard introduces a system for classifying individuals with mental retardation based on intelligence quotient (IQ): moron for those with an IQ of 51-70, imbecile for those with an IQ of 26-50, and idiot for those with an IQ of 0-25.
July 15 – Publication of the eighth edition of Emil Kraepelin's Psychiatrie: Ein Lehrbuch für Studierende und Arzte, naming Alzheimer's disease as a variety of dementia.[5]
January 12–13 – Birth of public radio broadcasting: Lee De Forest conducts an experimental broadcast of part of a live performance of Tosca and, the next day, a performance with the participation of the Italian tenor Enrico Caruso from the stage of Metropolitan Opera House in New York City.[15][16]
^Fahn, S. (2008). "The history of dopamine and levodopa in the treatment of Parkinson's disease". Movement Disorders. 23 Suppl 3: S497–508. doi:10.1002/mds.22028. PMID 18781671.
^Pesaran, M. Hashem (1987). "Econometrics". The New Palgrave: A Dictionary of Economics. 2. pp. 8–22.
^Berchtold, N. C.; Cotman, C. W. (1998). "Evolution in the conceptualization of dementia and Alzheimer's disease: Greco-Roman period to the 1960s". Neurobiology of Aging. 19 (3): 173–89. doi:10.1016/S0197-4580(98)00052-9. PMID 9661992.
^Goh, L. G.; Ho, T. M.; Phua, K. H. (January 1987). "Wisdom and Western Science: The Work of Dr Wu Lien-Teh". Asia-Pacific Journal of Public Health. Historical Milestones. 1 (1): 99–109. doi:10.1177/101053958700100123. PMID 3330665.
^Jacobaeus, Hans Christian (1911). "The Possibilities for Performing Cystoscopy in Examinations of Serous Cavities". Münchner Medizinischen Wochenschrift.
^Hatzinger, Martin; et al. (4 December 2006). "Hans Christian Jacobaeus: Inventor of Human Laparoscopy and Thoracoscopy". Journal of Endourology. 20 (11): 848–850. doi:10.1089/end.2006.20.848. PMID 17144849.
^Kane, Joseph Nathan (1981). Famous First Facts (4th ed.). New York: The H.W. Wilson Company. p. 442. ISBN 978-0-8242-0661-1.
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