of Organic Bodies. 



275 



Potash . , . 

 Soda .... 

 Lime .... 

 Magnesia . . 

 Peroxide of iron 

 Phosphoric acid 

 Sulphuric acid . 

 Silica . . . 

 Sand .... 



100-00 



100-00 



Hence the phosphates of the excrements are c-phosphates, 

 and the bases are all in the proportion of three atoms to one 

 of phosphoric acid. In the aqueous extract, the greater part 

 of the potash is either combined with carbonic acid, or exists 

 in the form of potash ; whilst in the excrements themselves, 

 the alkali was combined with an organic substance, which 

 occupied the place of an acid. Since the faeces principally 

 carry off those oxidized salts which are insoluble in water, 

 whilst the urine removes those which are soluble in water, 

 most of the inorganic constituents of the faeces are contained 

 in the muriatic extract of the carbonized mass. The large 

 quantity of phosphate of magnesia in this ash is remarkable. 



The excrements might be regarded as teleoxidic substances; 

 at least the unoxidized inorganic matters existing in them are 

 so small, that they probably arise merely from the undigested 

 remains of the food. The small quantity of soda present, 

 compared with that of the potash, is also remarkable ; espe- 

 cially as the bile principally contains soda, and but little pot- 

 ash. Hence the soda of the bile must be removed by the 

 urine, not the faeces. The following are the inorganic con- 

 stituents of the faeces as obtained by the three operations :- 



Chloride of potassium 0-07"^ 

 Chloride of sodium . 0*58 

 Potash 12-4-4 



Hydrate of potash 



Soda 



Lime . . . . 



Magnesia . . 

 Peroxide of iron 

 Phosphoric acid 

 Sulphuric add 

 Silica . . , 

 Carbonic acid . 

 Sand .... 



10-05 

 0-75 



21-36 



10-67 

 2-09 



30-98 

 1-13 

 1-44 

 1-05 

 7-39. 



10-000 

 T2 



)>ov< 



100-00 



