362 



INDEX 



R 



Rapeseed oil, 78 



Raw bones as a fertilizer, 221 



Red corpuscles, 313 



rubber, 92 

 Rennin, 330 

 Resenes, 87 

 Resin ducts, 87 

 Resins, properties of, 87 

 Respiration calorimeter, 337 



in plants, 34 

 products of, 35 



in seeds, 20 



due to oxidases, 24 

 Respiratory quotient, 318 

 Reversion of acid phosphate, 226 

 Ripening of cheese, 349 

 Rise of alkali, 193 

 River water, composition of, 181 

 Rock lime as fertilizer, 248 



phosphate, 223 



use of, with farm manure, 264 

 Rocks, soil forming, 183 

 Root hairs, 29 

 Roots, function of, 31 



purpose of fleshy, 38 



selective action by, 29 

 Roquefort cheese, 349 

 Rosin, 88 



oil, 88 



use of, in making miscible oils, 

 290 



spirit, 88 

 Rubber, 91 

 Ruminants, gastric digestion of, 



329 

 Rye seed, discussion of composition 



of, 117 



S 



Saccharates, 60 



Saccharimeter, 52 



Saccharose. See also Sucrose, 56 



Safrol, in oil of sassafras, 84 



Saliva, 328 



Salivary digestion, 328 



Salting out proteins, 96 



Sand soils, 188 



Sandarac, 89 



Sandstones, 186 



Sarcolactic acid, 311 



Sawdust, use as litter, 259 



Schweitzer's reagent, 68 



formula for, 286 

 Scrape, 91 



Seedling, food for, 21 

 Seeds, production of, 38 

 Sedimentary rocks, 183 

 Selective action by roots, 29 

 Separator for cream, 347 

 Serum, 315 



albumin, 313 

 Shales, 186 



Shavings, use as litter, 259 

 Shellac, 89 

 Siderite, 171 

 Sieve tubes, 34 

 Silage, 126 



making, chemical changes in, 126 

 Silicic acids, 166 

 Silicon compounds in animal, 323 



minerals in soil, 171 

 Silk, artificial, 69 

 Slaked lime as fertilizer, 249 

 Sludge acid, use in making fertil- 

 izers, 301 

 Soap, 74 

 Soda cellulose, 68, 69 



process for making paper pulp, 

 70 

 Sodium arsenate, use of, in making 

 lead arsenate, 284 



compounds in animal, 322 



cyanide, use of, in making hydro- 

 cyanic acid gas, 287 



minerals in soil, 171 



nitrate, availability of, 207 

 effect of, on fertilizer mixtures, 

 203 

 on soil, 207 

 as a fertilizer, 206 

 Soil acidity, 241 



how determined, 276. See 

 Lime requirement. 



analysis, 273 



composition of, 139 



distinction of, from subsoil, 191 



functions of, 139 



solvents, 163 



and subsoil, 191 

 Soils, composition of, 190 



kinds of, 186 



weight of, 190 

 Solubility of soil minerals, factors, 



172 



