352 INDEX. 



different sources, 308 ; of albumen from white of egg, ib.; of 

 albumen from different sources, 310; of fibrine, 311; of gela- 

 tine from different sources, ih.; of tissues containing chondrine, 

 312 ; of the tunica media of arteries, ih. ; of horny tissues, ib.; 

 of the lining membrane of the e^^, 313 ; of feathers, ib.; of the 

 pigmentum nigrum oculi, ib. Results of his researches, 125, 

 126. 



Secretions. See Bile and Urine. 



Seguin. His calculation of the amount of inspired oxygen, 283. 



Serpents. Their excrements consist of urate of ammonia, 54. 

 The process of digestion in them, 53. 



Sleep, Theory of, 228. Amount of sleep necessary for the 

 adult, the infant, and the old man, 247 et seq. Induced by 

 alcohol or wine, 240. 



Soda. Essential to blood and bile, and derived from common 

 salt, 161 e^ seq. 



Sodium, Chloride of. See Salt. 



SoLANiNE. Contains nitrogen, 177. Its analysis, 323. 



Starch. Exists in the food of the herbivora, 70. Is convertible 

 into sugar, 70, 71. Its relation to gum and sugar, 73. Its 

 function in food, 74 et seq. Amount of carbon in starch com- 

 pared with that in flesh, 76, 77. Its composition compared 

 with that of fat, 84, 90. Is the source of diabetic sugar, 95. 

 Is an element of respiration, 96. Dissolved by diastase, 111. 

 Its relation to choleic acid, 152. Its relation to the principal 

 secretions and excretions, 153 ; to choloidic acid, 157 ; to bile, 

 158, 162, 164, 166. Its analysis from fifteen different plants, 

 297. 



Starvation. Process of, 25. Cause of death in, 27. 



Strecker. His analysis of starch from 12 different plants, 297. 



Sugar. Analysis of grape-sugar, 597 ; of sugar of milk, 298 ; 

 of cane-sugar, 300. Is an element of respiration, 96. 



Sulphur. Exists in albumen, fibrine, and caseine, 41, 126. 



Sulphuretted Hydrogen. Theory of its poisonous action, 

 274. 



Sulphuric Acid. See Acid, Sulphuric. 



Supply of matter. See Nutrition. 



Supply and Waste. Equilibrium between them constitutes the 

 abstract state of health, 254, 255. Effects of its disturbance, 

 ib. et seq. Means for restoring the equilibrium, 248, 257 et 

 seq. 



