A practical treatise on the diseases of the ear : including the anatomy of the organ / by D.B. St. John Roosa.

  • Roosa, D. B. St. John (Daniel Bennett St. John), 1838-1908.
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: A practical treatise on the diseases of the ear : including the anatomy of the organ / by D.B. St. John Roosa. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    of the labyrinth, won such a reputation by his work upon the internal ear, that he was called to the anatomical chair at Naples. He was the first clearly to show that the labyrinth was filled with fluid, and that this was one of the neces- sities for the perception of the undulations that we call sound. 1747-1832] Antonio Scarpa issued a work on the structure of the ear, which brought the knowledge of its inner arrangement to such a height that it seemed to his contem- poraries that there was little more to be done. The investi- gations of our own day have shown how premature was this expression. Scarpa wrote upon the fenestra rotunda, which connects the tympanic cavity with the lamina spiralis of the cochlea. He described the osseous labyrinth with exactness, the membranous labyrinth, and the expansion of the acoustic nerve. Scarpa was secretary to the octogenarian Morgagni, when the latter had lost his sight, and he wrote letters of advice in Latin at the dictation of his blind preceptor. 1797] Alexander Monro, Professor of Anatomy, Medicine and Surgery, in the University of Edinburgh, was the author of a monograph on the organ of hearing in man and other animals. It is a fine specimen of typography. In his preface he states that Dr. Camper called in question his description of the semicircular canal in whales, and that Scarpa said that some of his teachings in regard to the human ear were erroneous. Professor Monro claims to have been the first anatomist to trace the auditory nerve within the cochlea, vestibule, and semicircular canals. He quotes from Valsalva, Winslow, Cassebohm, Haller, Cotunnius, Mec- kel, and others, to show that none of these anatomists had traced nerves into the cochlea. Dr. Monro seems to make out a good case for himself as against Scarpa, as far as I have been able to determine, and to be entitled to the credit of having traced the nerves into the cochlea before with greater minuteness than Scarpa, and appears to have been correct in his comparative anatomy. * Three treatises on the Brain, the Eye and the Ear. Edinburgh and London, 1797.