Author: FREUD, S.,
Title: Beobachtungen über Gestaltung und feineren Bau der als Hoden beschriebenen Lappenorgane des Aals.
Description: (Wien, K.k. Hof- und Staatsdruckerei, 1877. ). W. 1 lith. plate (by Dr. J.Heitzman after drawings by Freud). (Offprint from "Sitzungsberichte der K. Akad. d. Wiss., 1e Abth., vol. 75 (1877). Original brown printed wrappers. (8 lvs. (13, III pp.). First separate printing. DSB V, pp. 171 - 181: Grinstein, 10357: Grinst. Bibliogr. item 9: Jones, Life and Works, vol. I, Chapter 4 (The Medical Student, 1873 - 1881), p. 42: 'At the end of the semester in March, 1876, after having been a university student for two and a half years, he began the first of his numerous original researches. It was suggested to him by professor Claus [who was] specially interested in marine zoology. ... The task assigned to him [Freud] concerned what had remained a puzzling problem since the days of Aristotle. The gonadic structure of eels had never been settled. As he wrote in his paper: "No one has ever found a mature male eel - no one has yet seen the testes of the eel, in spite of innumerable efforts through the centuries.". The difficulty was evidently bound up with their extraordinary migration before the mating period. In 1874 Syrski at Trieste had described a small lobed organ and considered that it represented the missing testes. It was a finding that obviously had to be checked and this is what Freud set out to do. Claus was plainly satisfied with the beginning, since he renewed the grant for another visit in September of the same year. ... In all, Freud dissected some 400 eels and he found the Syrski organ in many of them. On microscopic examination he found the histological structure to be such that it might well be an immature testicular organ, though there was no definite evidence that it was so. Nevertheless his paper, which Claus presented to the Academy of Sciences (March 15, 1877, published in the April number of its Bulletin), was the first of a series that confirmed Syrski's suggestion.': Norman Coll. II, F2: 'This was Freud's first research as a medical student, although it appeared in print 3 months after his work on Reissner cells in "Petromyzon" ... ': Norman Sale III, 1377 (in lot): Stanford, Exh. cat. Freud, item 2: Freud's second published paper, written when he was 21, under the guidance of Carl Claus, head of the Institute of comparative anatomy at Vienna and founder of the Zoological Experimental Station at Trieste.

Keywords: biology freudiana NVVA2018 Brk