280 



INDEX. 



Propionic acid, 118, 125 

 Protagon, 137 

 Protalbumose, 43 

 Proteids, 552 



,, composition of, 5, 50 

 ,, crystalline, 6 



ash of, 6 



,, general reactions of, 7 

 classification of, 9 

 ,, coagulated, 9, 34 

 ,, digestive changes of, 36, 37 

 duplexity of molecule of, 37 

 ,, their decomposition by acids, 



39,49 

 ,, products of decomposition of, 



48 

 ,, theories of the constitution of, 



51 



'Protein' described by Mulder, 18 

 Protogelatose, 82 

 Pseudoxanthin, 208 

 Ptomaines, the, 205208 



their similarity to vegetable 



alkaloids, 205, 206 

 Ptyalin, preparations of, 56 



its action on starch, 57 

 Purple, visual-, 262, 265 

 Pus-cells, nuclein prepared from, 88 

 Pus-corpuscles, presence of glycogen in, 



96 



Putrefactive organisms, action on cellu- 

 lose of, 100 

 Putrescin, 207 

 Pyocyanin, 270 

 Pyoxanthose, 270 

 Pyrocatechin, 197 



Eennet, use of, in cheese-making, 64 

 Bennin, its clotting action on milk, 21, 



65 



,, its enzymic nature, 65 

 Eenninogen, 65 



Eetina, pigments of the, 262267 

 Khodophane, 262, 265 

 Ehodopsin, 262, 265 

 Eotation of light, mode of measurement 

 of, 103 



Saccharic acid, its connection with gly- 



curonic acid, 107 

 Saccharose, 110 



Saliva, ptyalin a constituent of, 56 

 ,, mucin a constituent of, 76 

 ,, its action on starch-paste, 111 

 ,, presence of sulpho-cyanates in, 



163 

 Salkowski-Ludwig method, estimation 



of uric acid by the, 168 

 Sarcolactic, or paralactic, acid, 125, 126, 



127 



Sarkin, 180 

 Sarkosin, 141 



Scherer's test for inosit, 109 

 Schiff's reaction for uric acid, 168 



Schultze's reagent for cellulose, 100, 



note 

 Schweitzer's reagent, preparation of, 99, 



note 



Seidel's reaction for inosit, 110 

 Serum albumin, chemistry of, 12 



,, preparation of, 13 



Serum-casein, 26, note 

 Serum-globulin, 26 

 Serum-lutein, 268 

 Skatol, its combination with glycuronic 



acid, 107 



,, preparations of, 202 

 ,, reactions of, 203 

 occurrence of, in a vegetable 



tissue, 204 



,, compounds of, 260 

 Skatoxyl-pigments, 260 

 Skatoxyl-sulphuric acid, 203 

 Snake's eggs, elastin-like substance in, 85 

 Soaps, formation of, with stearic and 



palmitic acids, 119 

 composition of, 124 

 Soda, sulphindigotate of, 201 

 Soluble starch, preparation of, 92 

 Spectrophotometers, 227 

 Spectrophotometry, 226 

 Spermaceti, cetyl-alcohol obtained from, 



116 



Spermin, 139, 140 



Spleen, presence of inosit in the, 108 

 ,, disintegration of red corpuscles 



in the, 251 



Starch, hydrolysis of, by ptyalin, 56 

 ,, by pancreatic secre- 



tion, 57 



sources of, 91 

 molecule of, 92 



soluble, 92 



digestion of, artificial and nor- 

 mal, 94 

 ,, its conversion into sugar in the 



body, 95 



Starch group of the carbohydrates, 91 

 Starch-paste, action of saliva on, 111 

 Stearic acid, 119 



Stearin (tri-stearin), preparation of, 122 

 Strecker's test for xanthin, 177 

 Stroma of red blood-corpuscles, proteid 



constituent of, 27 



Sub-maxillary gland, mucin of the, 77 

 Succinic acid, 131 

 Sugar in blood, determination of, 7 

 ,, conversion of hepatic glycogen in- 

 to, 58, 98 

 diabetic, 98 

 Sugars, the, chemistry of, 101 

 artificial, 102 

 ,, discrimination of, 102 

 Sulphindigotate of soda, 210 

 Sulpho-cyanic acid, its formation in the 



body, 163 



Sulphur, a constituent of fibrin, 33 

 ,, its presence in lardacein, 47 



