622 



INDEX 



Ohlert, 152. 



Oil, as product of photosynthesis, 320; as 

 reserve food, 595 ; translocation of, 592. 



Olive, mannite in, 577. 



Oltmanns, 352, 421, 497; osmotic value of 

 cell-sap in marine plants, 140. 



Omeis, 602. 



Omelianski, 560. 



Oncidium altissimum, \ 59. 



Optical characters of organized structures, 

 81. 



Orchidaceae, 371. 



Orchis, 470. 



Organic acids, 485, sec. 85, 487, sec. 86 ; 

 decomposition of, by light, 327, 328 ; 

 by heat, 328 ; accumulation and pro- 

 duction of, 328 ; formation of starch 

 from, 327-9 ; as food-material, 594 ; 

 influence of neutralization on production 

 of, 488; of alkalinity, 489; of 

 temperature, 488 ; Liebig's view of, 329. 



Organic food, absorption of, 363. 



Ornithogahnn arabicum, 474. 



Orobanche, 155, 365-9. 



Orthonitrophenylpropiolic acid, as test for 

 grape sugar in nectaries, 285. 



Orthotrichum, 337, 339, 595. 



Oryza, 473. 



Oscillaria, curve of photosynthesis in, 344, 

 Fig. 51. 



Osmotic pressure in the cell, 134, sec. 24; 

 influence of chemical combination on, 

 141 ; of dissociation on, 142 ; of 

 curvature of limiting membrane on, 

 136; of temperature on, 138; esti- 

 mations of, 145 ; physics of, 144 ; values 

 for, 137, 146, 147. 



systems, 135, 136. 



Ostwald, 67, 75, 76, 82, 92, 105, 125, 126, 

 MS. 327 346-50, 354, 363, S 1 ^; on char- 

 acters of crystals, 79 ; influence of 

 temperature on osmotic pressure, 138; 

 nature of irritable reactions, 10; osmotic 

 pressure of mixed solutions, 142 ; - 

 physics of, 144. 



Otto, 437. 



Oudemans u. Ramvenhoff, 172, 451, 600. 



Overton, 99, 103, 104; on absorption of 

 aniline dyes, 96 ; erythrophyll, 496. 



Oxalic acid, influence of temperature and 

 light on production of, 488 ; production 

 and decomposition of, 488, 489. 



Oxalis, 337 ; oxalic acid in, 141. 



Oxidase enzymes, 509, 510. 



Oxygen, effects of absence of, 569 ; influence 

 of, on fermentative activity, 547, 554; 

 on development of chloroplastids, 335 ; 

 on photosynthesis, 339; minimal and 

 maximal percentages of, for aerobes 

 and anaerobes, 539-42 ; occlusion of, 

 570; presence of, in cell, in neutral 

 form, 321. 



Ozone, absence of, from living cell, 545. 



Pacht, 101. 



Padina pavonia, 128. 



Paeonia, 473 ; ripening of, 601. 



Palla, 320 ; influence of nucleus on cell-wall 

 formation, 53 ; on karyoids, 48 ; Schizo- 

 phytes, 43 ; staining of living nucleus, 



94- 



Palladin, 64, 335, 460, 461, 466, 529, 537, 

 570; influence of oxygen on meta- 

 bolism, 537 ; respiration in etiolated 

 plants, 525 ; in leaves, 563 ; ratio 

 between respiration and percentage of 

 proteids, 521. 



Palmella, 411. 



Pammel, on fermentation without gas-pro- 

 duction, 534. 



Pangens, 49, 50. 



Pangium.edule, 391, 406, 407, 457, 494; 

 hydrocyanic acid in, 577 ; trans- 

 location of, 592. 



Papain, 508, 509. 



Pafaver somniferum, 592. 



Pappenheim, 182, 202 ; negative pressure in 

 tracheides, 201. 



Paraheliotropic movements, importance of, 

 238. 



Paramylon, 320. 



Paraplasm, 46. 



Parasites, penetration of, 373. 



Parmelia, 337. 



Passage of gases through cells and cell- 

 walls, 183, sec. 30. 



Passler, 585, 600. 



Pasteur, 306, 383, 397, 533, 537, 538, 542, 

 557; on anaerobiosis, 530, 534; on 

 fermentation and intramolecular re- 

 spiration, 552 ; nutrient solution of, 

 386. 



Pawlewski, 505. 



Payen, calcareous excretions, 133. 



Peckolt, 262. 



Pectin compounds, 477 ; distribution of, 482. 



Pedicularis, 369. 



Peirce, 216, 336, 369, 374; on penetration 

 of Cuscuta, 498. 



Pellet, 413. 



Pellionia, 304 ; P. daveauana, 314, Fig. 47. 



Penicillium, 210, 275, 407, 408, 426, 516, 

 517, 560; growth of, in concentrated 

 media, 421 ; influence of acid on proteo- 

 lytic ferment of, 509 ; production of 

 alcohol by, 539 ; regulation of produc- 

 tion of acid, 487-9; relation between 

 growth and fermentative activity of, 



553- 



glaucum, 373-6, 380-4, 387-9, 404, 

 494 ; accommodation of, to concen- 

 trated solutions, 139 ; assimilation of 

 nitrogen by, 394 ; influence of sugar 

 on production of diastase by, 504 ; 

 mannite in, 476 ; respiratory ratio of, 

 529 ; temporary anaerobiosis of, 536. 



Pennington, 345, 415. 



