82 DR. R. ANGUS SMITH ON THE EXAMINATION 



fields, or when the water comes from shallow or surface 

 drains, where the land had upon it a good deal of animal 

 matter. 



When, however, we come to towns or great collections 

 of animals, the chlorides, as well as the organic substances 

 with which they are allied, are the products mainly of 

 changes taking place in animal life. Let us compare the 

 amount of chlorides to be found in plants and in animals. 



Chlorides in the blood of animals (Nasse and Poggiale in 

 Gmelin) as chloride of sodium in looo parts. 



Dog 4-490 



Cat 5*274 



Horse 4659 



Calf 4-804 



Goat 5"i75 



Sheep 4'^95 



Rabbit 4*092 



Swine 4281 



Goose 4*246 



Hen 5396 



If we take the ashes, the amount is, according to Stolzel, 



For ox-blood S^'^9 



For ox-flesh 4-86 



Ashes of the serum in man *— 



Chloride of sodium 61*087 



,, potassium 4"o85 



The ashes of the blood in man 5 7'64i 



„ ,, of the horse, according to Lehmann 67*105 

 Urine 22*972 



But as the latter is produced so rapidly and frequently, it 

 is the greatest and most constant source of common salt. 

 No plant can be compared with animals in this respect. 



* Robin and Verdeil's ' Traite de Chimie Anatoniique.' 



