348 INDEX. 



of proteine alone are nutritious, 106. Occurs when the vital 

 force is more powerful than the opposing chemical forces, 198. 

 Theory of it, 210. Is almost unHmited in plants from the ab- 

 sence of nerves, 212. Depends on the momentum of force 

 in each part, 227. Depends also on heat, 243. 



O. 



Oats. Amount required to keep a horse in good condition, 74. 

 Analysis of, 298. 



Oil of Bitter Almonds. Its composition. How related to 

 benzoic acid, 279, 280. 



Old Age. Characteristics of, 248 et seq. 



Oppermann. His analysis of wax, 307. 



Organs. The food of animals always consists of parts of organs, 

 2. All organs in the body contain nitrogen, 42, 43. There 

 must exist organs for the production of nervous matter, 189 ; 

 and the vegetable alkalies may be viewed as food for these 

 organs, ib. 



Organised Tissues. All contain nitrogen, 42, 43. All such as 

 are destined for effecting the change of matter are full of small 

 vessels, 223. Their composition, 126. The gelatinous and 

 cellular tissues, and the uterus, not being destined for that 

 purpose, are differently constructed, 224. Waste of organised 

 tissues rapid in carnivora, 76. 



Origin. Of animal heat, 17, 31. Of fat, 81 et seq. Of the 

 nitrogen exhaled from the lungs, 114 et seq. Of gelatine, 127 

 et seq., 143. Of uric acid and urea, 135 et seq. Of bile, 135, 

 143, 146 et seq., 159. Of hippuric acid, 150, 325. Of the 

 chief secretions and excretions, 152. Of the soda of the bile, 

 161 et seq. Of the nitrogen in bile, 168. Of nervous matter, 

 183 et seq. 



Ortigosa. His analysis of starch, 297. 



Oxalic Acid. A product, along with urea, of the partial oxida- 

 tion of uric acid, occurring in the form of mulberry calculus, 

 137. Its analysis, 321. 



Oxygen. Amount consumed by man daily, 12, 283. Amount 

 consumed daily in oxidising carbon by the horse and cow, 14. 

 The absorption of oxygen characterizes animal life, 2. The 

 action of oxygen is the cause of death in starvation and in 

 chronic diseases, 25 — 28. The amount of oxygen inspired 



