MAKURK. 181 



ANIMAL SALTS. 



Urate of ammonia. 



Lactate of ammonia. 



Oxides of iron, manganese, and silica. 



In a word, are found, in animals, the inorganic parts of 

 soils, the elements of silicates, united with the inorganic 

 acids which existed in the soil, added to the organic, pro- 

 duced by the animal itself. These salts are common to ani- 

 mals and plants, but except in bones, they form only a small 

 part of the living body. 



217. In plants there are certain principles, as albumen and 

 gluten, so like animal products, that they have received the 

 name of vegeto-animal. But very late discoveries have 

 proved that they are identical with the fibrine and albumen 

 of animals. That these animal and vegetable products are 

 modifications of a principle called proteine, has been alluded 

 to (page 118). The late analyses of these various products, 

 shed a clear light over the multiform substances, from the 

 animal kingdom, used for manure. They show how like 

 products arise from the decomposition of plants, and thus 

 assimilate animal and vegetables in the process of forming 

 composts. 



Fibrine, or the basis of flesh, or muscular fibre, albumen, 

 and caseine, or the curd of milk and basis of cheese, are 

 composed as follows, by Mulder's analysis : — 



Fibrine. Albumen. Caseine. 



Hydrogen, 6.90 7.01 7.09 7.15 



