ANALYSIS OF BLOOD. 37 



potash and phosphoric add; the phosphoric acid is derived only from 

 the burned lecithin ; while the greater part of the sulphuric acid in 

 the analysis is derived from the burning of the haemoglobin. 



Analysis Of Blood. 1 : 000 parts, by weight, of HORSE'S BLOOD contain : 



344'IS blood-corpuscles (containing about 128 per cent, of solids). 

 655'82 plasma (containing about 10 per cent, of solids). 



1,000 parts, by weight, of MOIST BLOOD-CORPUSCLES contain: 



Solids, 367 '9 (pig); 400'1 (ox). 

 Water, 632 -1 599 '9 



The solids are: 



Pig. Ox. 



Haemoglobin, . . . . 261' 280 '5 



Albumin, 86 '1 107 



Lecithin, Cholesterin, and other/ ,<,. ... 



Organic Bodies, . . . \ 



Inorganic Salts, . . . . 8 "9 4'S 



{POTASH, . . 5-543 0'747 



Magnesia, . . O'lSS O'OIT 



Chlorine, . . 1'504 1-635 



PHOSPHORIC ACID, 2-067 0'703 



Soda, ... 2-093 (Bunge). 



24. Chemical Composition of the Colourless 



Corpuscles. 



Investigations have been made on pus cells, which closely resemble 

 colourless blood-corpuscles. They contain several proteids ; alkali albu- 

 ininate, a proteid which coagulates at 48C., and another resembling 

 myosin, fibrino-plastin, and a coagulating ferment; nuclein in the 

 nuclei (Miescher); perhaps also glycogen (Salomon), lecithin, and 

 extractives. 



100 parts, by weight, of dry PUS contain: 



Earthy Phosphates, . . 0'416 

 Sodic Phosphate, . 0'606 



Potash, . . . 0-201 



Sodic Chloride, . . . 0'143 



25. Blood-Plasma and its Relation to Serum. 



The unaltered fluid in which the blood-corpuscles float is called plasma, 

 or liquor sangulnit. This fluid, however, after blood is withdrawn from the 

 vessels, rapidly undergoes a change, owing to the formation of a solid 

 fibrous substance, FIBRIN, which seems to be produced by the coming 

 together of three special substances, the so-called fibrin-factors. After this 

 occurs, the new fluid which remains no longer coagulates spontaneously 

 (it is plasma, minus the fibrin-factors), and is called scrum. Apart from 



