IN RELATION TO ZOOLOGICAL DISTINCTION. 



61 



centration of the hemoglobin solution. The coefficients for human blood 

 based upon the values of Leichtenstern and others (Vierordt's Daten u. 

 Tabellen, 1906, 220 et seq.) are for men 1.2359, for women 0.9559, and for 

 children from 2 to 10 years of age 1.066. During the early weeks of life the 

 coefficient is much higher than in the adult, but later it falls for a time to 

 a point lower than in men, but higher than in women. Korniloff (Zeit. f. 

 Biologic, 1876, xii, 515), in comparative studies by this method of the bloods 

 of 110 vertebrates, including 44 species of both warm-blooded and cold- 

 blooded animals, reports the following average figures: Mammals 0.9366, 

 birds 0.7814, reptiles 0.4328, amphibia 0.3889, and fish 0.3564. Males, he 

 found, have a higher hemoglobin capacity than females, and the old a 

 higher capacity than the young. 



TABLE 24. The percentages of hemoglobin in relation to genera. 



The estimates recorded by Preyer, Abderhalden, Henocque, and others 

 by various methods are, broadly speaking, in accord with those of Korni- 

 loff. (Preyer, Die Blutkrystalle, 1872, 116, and Annalen d. Chemie u. 

 Phar., 1866, CXL, 187; Muller, Archiv f. Thierheilk., 1886, xii, 96; Henocque, 



