414 



HOW CROPS GROW. 



Nutrient matters in plant, Mo- 

 tion of 401 



Nutrition of seedling, . . . .357 



Nutrition of plant, 366 



Oat plant, Composition and 



growth of 223 



Oats, weight per bushel, . . .176 



Oil in seeds, etc., 83 



Oil of vitriol, 26, 130 



Oils, Properties of 83 



Oleic acid 86 



Olein, 85 



Orders, 328 



Organic matter, 12 



Organism, Organs, 243 



Osmose, 393 



Osmose, mechanical effects on 



plant, 406 



Osmometer, 394 



Ovaries, 318 



Ovules, 318 



Oxalates, 78, 149 



Oxalic acid, 78 



Oxides, 19, 20 



Oxides of iron, described, . 19, 141 

 Oxides of manganese, described 142 



Oxyfatty acids, 77 



Oxygen, Properties of .... 16 

 Oxygen occurrence in ash, . .128 

 Oxygen in Assimilation, . . . 364 

 Oxygen in Germination, . . .353 



Palmitic acid, 86 



Palmitin, 85 



Papain, 104 



Parenchyma, 255 



Papilionaceous plants, . . . 330 



Pappus, 331 



Pararabin, 59 



Paraglobulin, 96, 99 



Paragalactin, 61 



Pectic acid, 74 



Pectin bodies, 58, 59, 74 



Pectosic acid, 74 



Pectose, 58, 61, 74 



Pedigree wheat, 158, 344 



Pepsin, 104 



Peptones, 100 



Permeability of cells, .... 253 



Petals 318 



Phanerogams, Phaenogams,316, 329 



Phloridzin 69 



Phosphate of lime, 148 



Phosphate of soda, 148 



Phosphate of potash, .... 147 



Phosphates .28,132,147 



Phosphates function in plants, I'll 

 Phosphates relation to albu- 

 minoids, 221 



Phosphoric add, 27,132 



Phosphorite, 148 



Phosphorized substances, . . 122 



Phosphorus, 27 



Phosphorus pentoxide, . .27,132 



Physics 10 



Physiology, 10 



Piperin, .' 121 



Pistils, 318 



Pitii, 397 



Pith rays . 299 



Plastic Elements of Nutrition, 109 



Plumule, 333 



Pollarding, 286. 



Pollen, 318 



]'<>! iji/onum, convolvulus, Fertil- 

 ization of, Fig., 295 



Pome, 331 



Porosity of vegetable tissues, ..".-<.-> 

 Potato leaf, Pores of, Fig., . . 309 

 Potato stem, Section of, Fig., .304 

 Potato tuber, Structure and Sec- 

 tion of, Fig., 300 



Potash, 138, 144 



Potash lye, 139 



Potassium, 138,211 



Potassium carbonate, . . . .144 



Potassium Chloride, 149 



Potassium hydroxide, . . . .139 



Potassium oxide, 138 



Potassium phosphate, . . . .147 



Potassium silicate, 134 



Potassium sulphate, 146 



Prosenchyma, 2">5 



Protagon, 123 



Proteoses, 100 



Protoplasm 245 



Protein bodies, or Proteids, . . 87 

 Proximate Principles, . . . .37 



Quack grass, 287 



Quantitative relations among 

 ingredients of plant, . . . 220 



Quartz, 134 



Quince seed mucilage, . ... OB 



Radicle, 333 



Rafflnose, 68 



Reproductive Organs, . . 243, 315 



Rhizome 287 



Rind, 297 



Rock Crystal, 134 



Root-action, imitated, . . . .400 

 Root-action, Osmose in ... 399 



Root cap, 257 



Root distinguished from stem, 258 



Root excretions, 280 



Root hairs, 265 



Root, Seat of absorptive force 



in, 270,399 



Root stock, 287 



Rootlets, 260 



Roots, Growth of 256 



Roots contact with soil, . . . 266 

 Roots going down for water, . .L'T"' 

 Roots, Search of food by . . . 263 



Roots. Quantity of 263 



Rubidium action on oat, . . . 209 



Runners 286 



Saccharose, 60 



Saccharose, Amount of, in 



plants, 66 



Sago -51 



Salicin 69 



Salicornia, 191 



Sal-soda, 145 



Salsola 191 



Salts. Definition of 81 



Salts, in ash of plants, . . . .143 

 Saltwort 191 



