Horses' teeth : a treatise on their mode of development, anatomy, microscopy, pathology, and dentistry; compared with the teeth of many other land and marine animals, both living and extinct ; with a vocabulary and copious extracts from the works of odontologists and veterinarians / by William H. Clarke.

  • Clarke, William H.
Date:
1893
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Licence: Public Domain Mark

Credit: Horses' teeth : a treatise on their mode of development, anatomy, microscopy, pathology, and dentistry; compared with the teeth of many other land and marine animals, both living and extinct ; with a vocabulary and copious extracts from the works of odontologists and veterinarians / by William H. Clarke. Source: Wellcome Collection.

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    “ Malpighi,* in Avhose works may be detected the germs of many important anatomical truths that have subsequently been matured and established, says the teeth consist of two parts, of which the internal bony layers (dentine) seem to be composed of fibrous and, as it were, tendinous capillaments reticularly interwoven. “Leeuwenhoek,! having applied his microscopical observations to the structure of the teeth, discovered that the apparent (ibers were really tubes, and he com- municated a brief but succinct account of Ids discovery to the Koyal Society of London, which was published, together with a figure of the tubes, in No. 140 of their Transactions. Tlds figure of the dentinal tubes, with additional observations, again appeared in the Latin edition of Leeuwenhoek’s works, published at Leyden in 1730. The dentine of the human teeth, and also that of young hogs, is described as being ‘formed of tubuli spreading from the cavity in the center to the circumference.’ He computed that he saw a hundred and twenty of the tubuli within tlie forty-fifth part of an inch. He was aware also of the peculiar substance now termed the cement, or crusta petrosa, which enters into the composition of the teeth of the horse and the ox. “These discoveries may be said to have appeared before their time. The contemporaries of Leeuwen- * An Italian physician ; born in 1628 ; died in 1694. He was the first to apply the newly-invented microscope in the study of anatomy. X A Dutch naturalist and manufacturer of optical instruments. His microscopes were said to be the best in Europe. Besides his dental discoveries, he discovered the red globules of the blood, the infusorial animalcules, and that of the spermatozoa. Bom in Delft October 24, 1632; died there August 26, 1723,