304 THE BLOOD. 



by MAcMuNN, 1 is a brown coloring-matter occurring in the peri visceral fluid of 

 a variety of echinoderms. According to HENZE 2 the Ascidia contain a brown 

 pigment which contains vanadium but does not hold any oxygen in a dissociable 

 form. 



The quantitative constitution of the red blood-corpuscles. The amount 

 of water varies in different varieties of blood-corpuscles between 570- 

 644 p. m., with a corresponding amount, 430-356 p. m., of solids. The 

 chief mass, about TQ--fc, of the dried substance consists of haemoglobin 

 (in human and mammalian blood). 



According to the analyses of HOPPE-SEYLER 3 and his pupils, the red 

 corpuscles contain in 1000 parts of the dried substance: 



Haemoglobin. Protein. Lecithin. Cholesterin. 



Human blood 868-944 122-51 7.2-3.5 2.5 



Dog's " 865 126 5.9 3.6 



Goose's " 627 364 4.6 4.8 



Snake's " 467 525 



ABDERHALDEN found the following composition for the blood- 

 corpuscles from the domestic animals investigated by him: Water, 

 591.9-644.3 p. m.; solids 408.1-335.7 p. m.; haemoglobin, 303.3-331.9 

 p. m.; protein, 5.32 (dog)-7.85 p. m. (sheep); cholesterin, 0.388 (horse) 

 -3.593 p. m. (sheep) ; and lecithin, 2.296 (dog)-4.855 p. m. 



Of special interest is the varying proportion of the haemoglobin to the 

 protein in the nucleated and in the non-nucleated blood-corpuscles. These 

 last are much richer in haemoglobin and poorer in protein than the 

 former. 



The amount of mineral bodies in various species of animals is different. 

 According to BUNGE and ABDERHALDEN the red corpuslces from the pig, 

 horse, and rabbit contain no soda, while those from man, the ox, sheep, 

 goat, dog, and cat are relatively rich in soda. In the five last-mentioned 

 species the amount of soda was 2.135-2.856 p. m. The quantity of potash 

 was 0.257 (dog)-0.744 p. m. (sheep). In the horse, pig, and rabbit 

 the quantity of potash was 3.326 (horse)-5.229 p. m. (rabbit). Human 

 blood-corpuscles contain, according to WANACH, about five times as 

 much potash as soda, on an average 3.99 p. m. potash and 0.75 p. m. 

 soda. The nucleated erythrocytes of the frog, toad, and turtle also 



. iFredericq, Extrait des Bulletins de 1'Acad. Roy. de Belgique (2), 46, 1878; Lan- 

 kester, Journ. of Anat. and Physiol., 2 and 4; Henze, Zeitschr. f. physiol. Chem., 

 33 and 43; Krukenberg, see Vergl. physiol. Studien Reihe 1, Abt. 3, Heidelberg, 

 1880; Halliburton, Journal of Physiol., 6; MacMunn. Quart. Journ. Microsc. Science, 

 1885. 



2 Zeitschr. f. physiol. Chem., 72 and 79. 



3 Med.-chem. Untersuch., 390 and 393. 



