326 



INDEX 



Pentite, 86 

 Pepsin, 189, 190 



action on albumin, 190, 191 

 Peptides, 208 



Peptones, 191, 192, 206, 208 

 Percolating filters, 299 

 Perkin, A. G., 246, 247, 248 

 Permanent yeast, 138 

 Person, 149 

 Persoz, 136 

 Petri dish, 20 

 Phenolic compounds, 55 

 Phenols, 55 

 Phenyl alanin, 195 



hydrazine, 50, 54, 59, 87, 88, 

 95, 96, 113, 160 

 Phenylamine or amino benzene, 



56, 59 

 Philosopher's Stone, 132 

 Phlogiston, 153 

 Phosphate, constituent of bacterial 



food, 149 ; in yeast juice, 142- 



143 

 Phosphorus containing albumins, 



208 

 PiotrowsJci, 183 



Plant cells, chemical changes in, 

 263-271 

 globulins and viteUins, 208 

 Plasmolysis, 12 

 Plate culture, 20, 30 

 Platinum black, 145, 146 

 spongy, 3, 4, 145, 146 

 Plums, 96 

 Polarimeter, determination of 



optical activity by, 108-111 ; 



examination of action of in- 



vertase by, 126, of maltose by, 



129, of zinc lactate solution by, 



151, of glucose solution in, 



97 ; theory of, 65-75 

 Polarisation, 65 



Polariscope, 108. See Polarimeter 

 Polariser, 71, 109 

 Poly methylene hydrocarbons, 51 

 Polypeptides, 192, 194, 201 

 Polysaooharoses, 83, 84, 96, 99 

 Pope, 82 

 Popp, 211 

 Potatoes, 100, 163 

 Precipitants for sewage, 291 

 Precipitins, 11 

 Priestly, 266 



Primary alcohols, 52, 59 



amine, 59 

 ProUn, 199 



Prosthetic group, 208-209 

 Protamines, 204, 208 

 Proteids, 208 

 Proteins, 182 

 Proteolysis, 210 

 Proteolytic enzyme, 138, 140," 142, 



157, 189, 264, 271, 277 

 Protoplasm, 7, 12, 15, 181, 182 

 Ptomaines, 201 

 Puering process or bating, 157, 



211 

 Pure culture, 20 



of bacteria, 27 

 Purin, 200 

 Purin bases, 200 

 Putrescin, 201 

 Pyrollidin-carboxylio acid, 199 



QunsroLiNE, 52 



Eacbmic acid, 80 



Radio-activity, 106 



Raoult, 44 



Raulin's solution, 27, 128 



Rawson, 248 



Siamur, 136 



Reduction, 39 



Rennet, 95, 178, 179 



Respiratory fermentation, 14 



Reversible enzyme action, 129 

 reaction, 6, 10, 55 



Ribose, 93 



Rice, 100 



Ring hydrocarbons, 48 



Roquefort cheese, 278 



Rothamsted, 279 



RothweU Sewage Works, 294 



Royal Commission on Sewage Dis- 

 posal — findings re chemical clari- 

 fication of sewage, 293-295 ; 

 standards of purity for effluents, 

 307, 308 



Bussell, E. J., 261, 262, 271, 272 



Sacchabification, 122, 123 

 Sacoharomycetes, 18 

 Saccharose or sucrose, 94, 99 



