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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    in the membrana tympani, which he believed to be a constant anatomical condition. This supposed discovery excited the warmest discussion among such anatomists as Walther, Muysch, Morgagni, Cassebohm, and Valsalva. Hyrtl, the present dis- tinguished anatomical teacher of Yienna, showed that it was a rent in a macerated membrane ; but his predecessor, Berres, believed in its existence and described it minutely.* Quite recently Professor Bochdalek, of Prague, has revived the question,t and has described the foramen of Kivinus as a constant opening in the membrana tympani; this author says that there are sometimes two. It is, however, according to Bochdalek, so small as not to be seen without the aid of a magnifying glass. In a discussion in one of the medical societies of Vienna,:}: Professors von Patruban, Gruber, and Politzer, unite in affirming its existence, thus confirming Bochdalek's state- ment. 1718] The famous Ruyscli (Frederick), professor in Amster- dam, contributed to our knowledge of the distribution of the vessels of the cavity of the tympanum, and corrected Val- salva's statement that the ossicula were not covered by peri- osteum. 1730] Cassebohm (Joan. Frid.), published a monograph upon the ear, in six parts, which Lincke calls a monument to the German industry and spirit of inquiry of the time. Ein Denknial deutschen Fleisses und deutschen Beobach- tungsgeistes. He disproved Valsalva's idea of the close connection between the cavity of the tympanum and the cerebrum ; he •described the cochlea, and the development of the auditory apparatus in the foetus. 1747-1753] Brendel and Zinn, two Gottingen anatomists, the latter of whom is well known as the describer of the suspensory ligament of the lens, known as the zonula of Zinn, made further investigations as to the structure of the cochlea. 1761 ] Dominic Cotugn o, or Cotunni, the discoverer of the fluid * Prager Viertel. Talirscbrift, 1866, I. f Troltsch on the Ear, 2d American edition, p. 26. \ Monatsschrift fur Okrenheilkunde, Jahxgang III., No. I.