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.

    128/430 (page 104)
    tliameter in tlie pigeon, duck, and goose, varies from -0008 to •00044; tlie short diameter from 'OOGd' to •00029. Wagner estimates the two diameters, in the pigeon, at •OOOS and •OOOSS respectively. We find the largest blood-corpuscles in fishes. According, to Wagner 1 the largest corpuscles, at present observed, are those of the torpedo, their long diameter being ^002; in the skate he found them to vary from •001 to ^0012 in length; in the loach the long diameter was •0005; in the eel-pout, •00057; in the barbel -00066, the short diameter in this case being -0004. In the carp the long diameter is -0005, and the nucleus measures -00012. In the plaice, Schultz estimated the long and short diameters at -00062, and -00043 respectively, and the thickness at -00007. In the naked amphibia the corpuscles are very large. In the triton, Dumas and Prevost estimated the diameters at •00128 and -00078 respectively. In the Salamandra cristata, Schultz -found that the diameters were -00138 and -000804 and that the thickness was -000315. In the frog, the same observer, estimated the length, breadth, and thickness at -00108, and -00058, and -000017. Of all the amphibia, the water-snakes appear to possess the smallest blood-corpuscles.2 The instantaneous effect of water upon the blood-corpuscles is very remarkable, and is easily seen under the microscope: they swell, become globular, lose their distinct contoirr, and (if much water be added,) altogether disappear. If however the blood-corpuscles have nuclei of sufficient magnitude to admit of examination (as in the blood of fishes, reptiles, &c.), these nuclei will be seen swimming in the water after the disappear- ance of the capsules. The nuclei may be separated in a similar manner, by the addition of a little acetic acid. The acid in a few minutes dissolves the hsemato-globulin, and assumes a yellow colour. . Zur vergleichenden Physiologic des Blutes, 1833, p. 14. [The largest blood- corpusclcs do not occur in fishes, as stated in the text, but in some of the naked am- phibia. See Wagner’s Physiology, p. 236, English edition.] ... A very complete account of the si-^es of the blood-corpuscles of different animals, as far as they had been then ascertained, may be found 111 Wagner’s Nachtrage zur Pliysiologic des lUutes, 1839, p. 31.