350 INDEX. 



not known in what form, 121 et seq. Is an essential constitu- 

 ent of nervous matter, 184, 190. 



PHOSPHURETTED HYDROGEN. Occurs among the products of the 

 putrefaction of fishes, 190, 191. 



PICROTOXINE. Contains nitrogen, 177 (note). Its analysis, 323. 



PLANTS. Distinguished from animals by fixing carbon and giving 

 out oxygen, 2, 213 ; by the want of nerves and of locomotive 

 powers, 3. Their capacity of growth almost unlimited, 212. 

 Cause of death in plants, 214. 



PLAYFAIR, DR. L. His formula for blood, 113. His analysis of 

 faeces, of peas, of lentils, of beans, 285 ; of flesh and of blood, 

 314 ; of roasted flesh, 322. 



POISONS, VEGETABLE. Always contain nitrogen, 1 76 et seq. Dif- 

 ferent kinds of poisons, 170. Theory of the action of Prussic 

 acid and sulphuretted hydrogen, 274. 



POLYMERIC BODIES, 103. 



POTASH. Essential to the production of caseine or milk, 164. 



POTATOES. Amount of carbon in, 287. They form part of the 

 diet of soldiers in Germany, ib. Analysis of, 285 ; of starch 

 from, 297 ; of solanine from the buds of germinating potatoes, 

 323. 



PREVOST AND DUMAS. On the frequency of the pulse and respi- 

 rations, 292. 



PRODUCTS. Of the metamorphosis of tissues found in the bile 

 and urine, 132. Of the action of muriatic acid on bile, 133. 

 Of the action of potash on bile, 134. Of the action of water 

 and oxygen on blood or fibre, 136. Of the oxidation of uric 

 acid, 137. Of the oxidation of blood, 140. Of the action of 

 water on proteine, 141. Of the action of urea on lactic and 

 benzoic acids, 150. Of oxygen and uric acid on proteine, 151. 

 Of oxygen on starch and hippuric acid, 152. Of oxygen and 

 water on proteine and starch, 153. Of oxygen and water on 

 proteine when soda is absent, 154. Of the separation of oxy- 

 gen from starch, 157. Of the action of water on urea, 159. 

 Of the action of water and oxygen on caffeine or theine, aspa- 

 ragine, and theobromine, 180. 



PROTEINE. Discovered by Mulder, 105. Its composition, ib. 

 Produced alone by vegetables, 106. Is the source of all the 

 organic azotised constituents of the body, 107. Its formula, 

 121. Its relation to fibrine, albumen, caseine, and all the 



