German physician and writer on medical jurisprudence; born at Stargard, province of Pomerania, Prussia, May 22, 1851; graduated from Berlin University in 1875. From 1877 to 1884 he was assistant in the pharmacological institute of that university, and from 1879 to 1886 physician at Klinnsmann's lunatic asylum. In 1881 he became privat-docent in pharmacology at the university. In 1886 he was appointed physician-in-chief ("Stadtphysikus") to the board of health of Breslau, at the university of which city he was appointed assistant professor in 1887.
Of Lesser's numerous essays contributed to the medical journals may be mentioned: "Experimentelle Untersuchungen über den Einfluss Einiger Arsenverbindungen auf den Thierischen Organismus," in Virchow's "Archiv"; "Ueber die Localen Befunde beim Selbstmorde Durch Erhängen" and "Ueber die Wichtigsten Sectionsbefunde bei dem Tode Durch Ertrinken in Dünnflüssigen Medien," in the "Vierteljahresschrift für Gerichtliche Medizin."
Lesser is the author also of the well-known "Atlas der Gerichtlichen Medizin," 1884-92, and "Zur Lehre vom Abort," "Zur Lehre von den Kopfverletzungen Neugeborener," and "Erkrankungen Sowie Præ- und Postmortale Verletzungen des Halses," in Neisser's "Stereoskopischer Medizinischer Atlas."
- Pagel, Biog. Lexikon, s.v., Vienna, 1901.