INORGANIC PRINCIPLES. GASES. 



29 



Proximate Principle. 

 Phosphate of Lime (basic). 

 Carbonate of Lime. 



Carbonate of Soda. 



Carbonate of Potassa. 

 Phosphate of Magnesia. 

 Phosphate of Soda (neutral). 

 Phosphate of Potassa. 

 Sulphate of Soda. 



Sulphate of Potassa. 

 Sulphate of Lime. 

 Hydrochlorate of Ammonia. 

 Carbonate of Magnesia. 



Bicarbonate of Soda. 



Where Found. 



Universal. 



Bones, Teeth, Cartilage, Internal Ear, 

 Blood, Sebaceous Matter, and some- 

 times Urine. 



Blood, Bone, Saliva, Lymph, Cephalo- 

 rachidian Fluid, and Urine. 



Blood, Bone, Lymph, and Urine. 



Universal. 



Universal. 



Universal. 



Universal, except Milk, Bile, and Gastric 

 Juice. 



Same as Sulphate of Soda. 



Blood and Feces. 



Gastric Juice, Saliva, Tears, and Urine. 



A trace in the Blood and Sebaceous 

 matter. 



Blood (Liebig). 



The Gases. 



The gases (oxygen, hydrogen, nitrogen, carburetted hy- 

 drogen, sulphuretted hydrogen) * exist both in a gaseous state, 

 and in solution in some of the fluids of the body. Oxygen 

 plays a most important part in the function of respiration ; 

 but the office of the others is by no means so essential. 'Ni- 

 trogen seems to be formed by the system in small quantity, is 

 taken up by the blood and exhaled by the lungs; except dur- 

 ing inanition, when the blood absorbs a little from the in- 

 spired air. It exists in greatest quantity in the intestinal 

 canal. The carburetted and sulphuretted hydrogen, with 

 pure hydrogen, are found in minute quantities in the expired' 

 air, and are also found in a gaseous state in the alimentary 

 canal. From the offensive nature of the contents of the 

 large intestine, we would suspect the presence of sulphuretted 

 hydrogen in considerable quantity ; but actual analysis has 

 shown that the gas contained in the stomach and intestines, 



1 Carbonic acid is here omitted, and will be treated of under the head of ex- 

 cretions. 



