Experiments and observations in order to ascertain the means employed by the animal economy, in the formation of bone / by John Howship.

  • Howship, John, 1781-1841.
Date:
1815
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations in order to ascertain the means employed by the animal economy, in the formation of bone / by John Howship. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    15/42 (page 13)
    Examinations in Birds. Exam. 14. Some thin sections were carefully taken from the lower extremity of the injected femur of a goose, at twenty-one days old. The parts were so divided as to include the cartilage with the newly ossified bone. In dividing these sections it was observed, that they could be cut more readily, and were of a more soft and tough consistence than any bone yet examined. Under the microscope these sections appeared remarkably clean and well defined at the edsfes of their cavi- ties. A great number of highly injected membranous sheaths were found in all these sections, occupying the canals, and passing from the cartilage into the newly ossified portion of the bone *. It was observable, however, that these sections, although they gave less resistance to the knife than othei bones, had at the first glance an appearance of gi eater solidity than any bone formerly exa- mined. But when by exposure to the air, these sections became partially dry, a roughness upon the surface became perceptible, even to the naked eye. Exam. 15, The injected cartilages and bones