Volume 1

Animal chemistry : with reference to the physiology and pathology of man / by Franz Simon ; translated and edited by George E. Day.

  • Johann Franz Simon
Date:
1845-1846
Catalogue details

Licence: Public Domain Mark

Credit: Animal chemistry : with reference to the physiology and pathology of man / by Franz Simon ; translated and edited by George E. Day. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    1045. In very young infants tlie blood is tliin, and of low specific gravity; according to Denis the blood of tlio umbilical artenes has a specific gravity of 1075. The specific gravity of the blood of numerous animals has been determined by Dr. J. Davyi and by Nasse.] I found that the blood, as it issues from the aorta, has a temperature of 103° in the ox, and 99°*5 in the pig* Thackray places the temperature of the blood of the horse at 96°-8, of the ox at 99°-5, of the sheep at 101°-3, and of the duck at 105°-8. The temperature is always higher in birds than in the mammalia. The obsen'atious of J. Davy, Becquerel, Breschet, Mayer, and Saissy, tend to show that the temperature of arterial is about 1°‘8 higher than that of venous blood. Microscopic analysis of the blood. If the blood be examined with the microscope (either in a transparent living part, or immediately after its removal from the body), it will be seen to consist of a great number of yellow corpuscles swimming in a colourless fluid. In the higher animals the form of these corpuscles is either circular or elliptic, and invariably flattened. Under a magnifying power of 300 diameters, they assume the appearance of fig. lo iu the blood of man and the main- malia, of fig. 1Z» in the blood of birds, and of fig* Ic in the blood of fishes and amphibia. MiiUer® found the greatest degree of flattening in reptiles, amphibia, and fishes. He found that in frogs the thickness does not measure more than one eighth to one tenth of the long diameter, and that in man it measures about one fourth or one fifth of the transverse diameter. In addition to the blood-corpuscles, lymph-, chyle-, and sometimes oil-globules are present. The first two ai’e round, of a finely granular appearance, and about the size of the blood-corpuscles, from which they may be distinguished by their want of colour, their more perfect sphericity, and their granular appearance. ' Anatomiciil ami I’liysiological Researches, p. 21. 5 llandhuch der IMiysiologie des Menschen, vol. 1, p. lOm.