INDEX 



623 



Pentoses, 320 ; nutritive value of, 4/0. 



Penzig, 475. 



Peperomia, water-storage tissue in, 228. 



Pepsin, 508, 509. 



Peptone, nutritive value of, for fungi, 384. 



Perdrix, on butyric fermentation, 558. 



Peridiniitm tripos, 306. 



Periodicity, induction of, 25. 



Periploca, 580. 



Perrey, 320. 



Perseke, 158. 



Peters, 170, 600. 



Petermann, 396. 



Petit, 426, 427. 



Peyrou, 206. 



Peziza, 276 ; P. sclerotiorum, 376 ; enzyme 

 of, 507. 



Pfaundler, on viscous solids, 45. 



Pfeffer, 139, 174, 175, 181, 213, 217, 222, 

 260, 269-71, 284, 291-3, 298, 306, 

 312-8, 321-3, 331, 336, 343, 349, 350, 



352, 355, 356, 363, 367, 373, 374, 377, 

 380, 381, 385-7, 423, 428, 440, 450-2, 

 458, 461, 462,468,470-9, 485, 490,491, 

 494, 495, 5i6, 520-3, 536-9, 546, 549, 

 552, 559, 567-9, 576, _ 581, 589-9.1, 

 598 ; absence of reducing action in 

 living cells, 544 ; absorption of aniline 

 dyes, 93-6, 120-6; - - by root-system, 

 156; absorption and diosmosis, 101- 

 III ; accommodation to concentrated 

 solutions, 99 ; active albumin, 70-73 ; 

 bubble-counting method, 351 ; changes 

 on death, 66-68 ; dermatosomes, 81 ; 

 detection of salts by microchemistry, 

 586 ; diosmotic properties of cell, 91 ; 

 energy liberated by oxidation of sugar 

 into organic acids, 141 ; hyaloplasm, 

 48; hygroscopic absorption, 161, 162; 

 formation of asparagin in seeds, 600 ; 

 permeability of Mycetozoa to, 99 ; 

 formation of vacuoles, 47 ; injection and 

 excretion of solids, 45, 46; irritability, 

 21-3; osmotic pressure, influence of 

 curvature of limiting membrane on, 

 136 ; --of temperature on, 138 ; - - in 

 mixed solutions, 142 ; physics of, 144; 

 -restoration of, 143; - values for, 

 145, 146; oxidation of chromogens by 

 H 2 O 2 , 496 ; oxidatory changes, 545 ; 

 pangens, 49; photosynthesis, absence 

 of, in ultra-red rays, 347, 348 ; 

 secondary maximum of, in yellow rays, 

 345 ; proteids in living cells, 63 ; resis- 

 tant powers of cells with small radii, 140 ; 

 slow diffusion of colloids, 138; sources 

 of energy, 10, 2 1-23 ; swelling of organ- 

 ized bodies, 74-7 ; tagma, 77-9 ; tannin, 

 492; translocation, 592 ; of proteids, 

 583 ; through plasmatic connexions, 

 115 ; turgidity, readjustment of, 142 ; - 

 of guard and epidermal cells, 194 ; 

 importance of, 142. 



Pfeiffer, 396 ; on ripening, 602. 



Pfeil, 602. 



Pfitzer, 219, 220 ; water-storage tissues, 228. 



Pfliiger, 552. 



Phallus, 476. 



Phaseohcs, 171, 324, 400, 401, 464 ; autotro- 

 phism of cotyledon of, 596 ; depletion 

 f> S l 5'i importance of, 593; -- re- 

 moval of ash constituents from, 584 ; 

 P. nutltiflorus, 427 ; photosynthetic 

 activity of, 357 ; self-depletion of coty- 

 ledons of, 599. 



Phenol, nutritive value of, for fungi, 384. 



Phenylanilin, replacement of leucin by, in 

 etiolated seedlings, 465. 



Phillips, 437. 



Phisalix, 497. 



Phloem, importance of, in translocation, 



574- 575- 



Phloroglucin, 491-3 ; in cell-sap, 97. 



Phoenix, 597 ; enzymes of, 507 ; escape of 

 proteids from endosperm of, 95, 600 ; 

 P. dactylifera, depletion of isolated 

 endosperm of, 599. 



Phosphates, 428. 



Phosphorus, source and importance of, 428. 



P/iofobacteriiuii, 381 ; P. htminosum, 532. 



Photomorphosis, 25. 



Photophilic plants, 358. 



Photosyntax, 302. 



Photosynthesis, definition of, 292 ; of other 

 carbon compounds, 326 ; inhibition of, 

 336 ; optimal percentage of carbon 

 dioxide for, 332 ; theory of, 352 ; 

 specific powers of, in different chloro- 

 plastids, 357. 



Photosynthetic assimilation, definition of, 

 302 ; influence of temperature on, 337 ; 

 of anaesthethics and oxygen, 339. 



Phycocyanin, 317,495 ; influence on photo- 

 synthesis, 343, 344, Fig. 51. 



Phycoerithrin, 316, 495 ; influence of, on 

 photosynthesis, 342, 343, 348-351. 



Phycophaein, 317. 



Physiological combustion, mechanism and 

 causes of, 539, sec. 100; 543, sec. 101. 



Physiology, aim of, 5, 8 ; definition of, 3. 



Physocles, 320. 



Phytoliicca decandra, 279. 



Phytophthora, 566. 



Picea e.vcelsa, respiratory activity of, 525. 



Pick, 495-7- 



Pickering, 70. 



Pictet, influence of temperature on chemical 

 reactions, 512. 



Pierre, 436, 586. 



Pigments, 494, sec. 88 ; nature of, 495 ; 

 influence of external conditions on for- 

 mation of, 496, 497. 



Pilobolus, 275, Fig. 37. 



Pinguicula, 378, 379; P. alpina, 285. 



Pimis, 149, 372 ; P. abies, root-system of, 

 Z 53 ! P> picea, 333 ; P. sylvestris, 259 ; 



