314 



INDEX 



Perception, of contact stimuli, 278, 283; of geo- 

 tropic stimuli, 267; of phototropic stimuli, 251. 



Periderm, of potato tuber, g8. 



Periodic movements, of floral parts, 26X. 



Periodicity, in transfer of carbohydrates, 138; in 



transpiration, 126; in growth, 245. 

 , Permeability, of prgtnnlasm. m, 240, 241, 282. 



Peroxidases, 152, 203, 205, 206. 



Peroxides, 152. 



Peru, 28s. 



Pettenkoffer tubes, 19S, 196. 



Petri dish, S9- 



Petrograd, 226, 227. 



Petrolatum, too. 



Petruschewsky, see Petrushevskaia. 



Petrushevskaia, on temperature and enzyme action, 

 IS4. 



Pfannenstiel, see Willst&tter and P. 



Pfeffer, Osmotische Untersuchungen, 104, 105; on 

 absorption of aniline dyes, izi; on selective 

 absorption, 112; on proteins and asparagin, 

 156; on respiration, 181; on respiration and 

 wounding, 193; on intramolecular^respiration,, 

 201 ; plant physiology, 4, 221; on day and 

 night movements of floral parts, 261, 280; on 

 pressures exerted by growth, 273, 274, 27s; on 

 contact sensibility, 276; PfeSer clinostat. 263; 

 osmotic cell, Z04. 



Pfingstberg, S3. 



PfiUger, on respiration, iSi. , 



Phaeophytin, 13. 



Pharbiiis, 277. 



Phaseolus (see also bean), 136, 173, 218, 233, 247, 

 251, 276. 



Phenol, S6, 185. 



Phenol-phthalein, 95. 



Phenological observations, 225, 226. 



Phenyl-alanin, 14s, 146. 



Phloem, 137, 138. 



Phosphates, 8s, 182, 194, 207. 



Phosphatides, 78; and lipoids, 168-170. 



Phosphorite, 88-90. 



Phosphorus, 3, 63, 76, 78, 83, 84, 87, 96, 139, 147, 

 IS9. 166, 168, 2SS. 



Photographic paper, 260. 



Photolepsy (see also Lichtgenuss) ,259. 



Photometric sensitiveness, 246. 



Photosynthesis, 3, 4; r61e of chlorophyll in, 18, 19; 

 r61e of carotin in, 19; products of, 28-32; in- 

 fluence of conditions on, 34-36; and light, 21 

 28, 32-36, 192; and asparagin, is6; and cane 

 sugar, 171; and energy circulation, 212; and 

 etiolation, 253-255; and development, 254, 

 258. 



Phototropism, 24s, 246, 249, 250, 267; of flowers, 

 248; of leaves, 247, 248; of moulds, 249; of 

 roots, 249; of tendrils, 278. 



Phycocyanin, 21; phycoerythrin, 20, 21; phyco- 



phsein, 21. 

 Phyllocactus, 253. 



Phyllocyanin, 11. 



Phyllophyllin, 13. 



Phylloporphyrin, 11-13. 



Phylloxanthin, 11. 



Phylogeny, of plants, 272; of twining habit, 279. 



Physiography, 244. 



Physiological dryness, of soil. 95. 



Physiology, xxi, 244; the cell as physiological unit, 

 139. 



Phytin, 170. 



Phytoalbumins, 143. 



Phytoglobulins, 143, 144. 



Phytyl, in chlorophyll molecule, 8, 9, 13. 



Picea, 287, 288. 



Pickering, on toxins in soil, 93, 95. 



Platers, on tissue strains as stimuli, 272. 



Pigments (see also respiration pigments), 21, in; 

 accompanying chlorophyll, 19-21 ; comple- 

 mentary, 36. 



Pilobolus, 249, 261, 



Pine, 27, 213, 224. 



Pisum (see also pea), 150, 169, 223, 251. 



Pith, 138. 



Pitschf on nitrate fertilizers, 6B; P. and van Haarst, 

 on nitrate fertilizers, 68. 



Plagiotropism, 263. 



Plant lice, 80. 



Plasmodium, 139. 



Plasmolysis, X06-108, 113, 214, 216. 



Plaster, of Paris, 42, 117, 134, 273, 274. 



Plastic materials, 137; transfer of , 121. 



Plastiline, 123. 



Plastin, 177. 



Platinic chloride, xxiii, 84, 148. 



Plimmer, on proteins, 140, 147; P. and Scott, on 

 phosphoproteins, 147. 



Podsol, 89, 90. 



Poisoning, compared to nutrition, 207. 



Poisons, 167, 193; and geotropism, 267; and nuta- 

 tion, 231, 232; and respiration, 206, 207; and 

 starch formation, 38; for enzymes, 155. 



Polarity, 291. 



Pollacci, on aldehyde in plants, 30, 



Pollen, 297; chemotropism of pollen tubes, 296. 



Polovtsov, on respiration of fatty seeds, 195. 



Polygonum, 172, 252, 276. 



Polymerization, 256. 



Polymorphysm, of hay bacillus, 270. 



Polyp&ptides, 146, 161. 



Polyporus, 171. 



Polzeniusz, see Godlewski and P. 



Poppy, 144, 176, 195. 



Pores, diffusion through, 100, loi. 



Posternak, on formation^ of oxymethyl-phosphoric 

 acid in leaves, 31. 



Potassium, 69, 76, 78, 82-84, 86, 96, 255; carbonate, 

 44; chloride, 80; chloroplatinate, 8s; citrate, 

 108; dichromate, 15, 23, 25; ferrocyanide, 8s, 

 104; hydroxide, 4, 6, 28, si, 141, 164, 196, 

 229; iodide-iodine solution, 28; myronate, 151; 

 nitrate, 76, 77, 105-108, no, 114, 115, 188, 214; 

 permanganate. 25, 56; phosphate, 46; siUcate, 

 44; sulphate, 81, 108, no, isi. 



Potato, 81, 95, 130, 142, 167, 170, 194, 251, 253, 288, 

 289. 



Potonie, on morphology and paleontology, 272. 



Pouget and Chouchak, on "soil sickness," 95. 



Prantl, on guttation, 128. 



Prazmovskii, on bacteria of root tubercles, 72. 



Prazmowski, see Prazmovskii. 



Precipitation membranes, 104, in, 21s. 



Precipitin, in rabbit, 294. 



Presentation time, in geotropic response, 264. 



Preserves, and sterilization, si. 



