An experimental essay on the conversion of chyle into blood / by James Hutchinson, A.M. ; House Surgeon of the Pennsylvania Hospital.

  • Hutchinson, James, active 1803.
Date:
1803
Catalogue details

Licence: Public Domain Mark

Credit: An experimental essay on the conversion of chyle into blood / by James Hutchinson, A.M. ; House Surgeon of the Pennsylvania Hospital. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

    23/54
    10 The atmofphere, which we breathe, is com- pofed of two very different gafes, viz. oxy- genous, and azotic ; and generally contains a very fmall portion of carbonic acid. This laft however is confidered as a foreign matter, and not a neceflary ingredient. According to modern Chemifts and Phyfiologifts, in re- fpiration, the oxygenous part of the air is ab- forbed by the blood in the pulmonary veffels, and unites with the phofphorus that it con- tains, forming phofphoric acid, which com- bines with the iron of the globules, and gives them their red colour. Mr. Davy believes, that a portion of azote, as well as oxygen, is alfo abforbed, though this is doubted by feveral very eminent Chemifts. Water in the ftate of vapour, and carbonic acid, are evolved from the pulmonary artery; but whether a fmall portion of both, or either of them, comes from the fluid of the thoracic duel, we are uncertain. The effeel produced on the blood by this alternate abforption, and emiffion of air, is a change in it from a dark purple to a florid colour. P. 2