494 



GLOSSAKIAL INDEX. 



Potassium, occurrence of, in plants, 247; 

 office of, in the plant, 252. 



Potential energy, 307. 



Precipitation-membrane, 225. 



Preparation of specimens, 21. 



Preservation of wood, 142. 



Pressure, effect of atmospheric, upon 

 germination, 369, 464 ; effect of atmos- 

 pheric, upon growth, 389; effect of, 

 upon movements of protoplasm, 208; 

 growth retarded by external, 395; of 

 sap in the stem, 264. 



Prickles, 69. 



Primary cortex, 119. 



Primary membrane, 36. 



Primary structure, 105; of the root, 106; 

 of the stem, 119. 



Primine (primus, first), 178. 



Primordial tissues, 58. 



Primordial utricle, 27, n., 220. 



Procambium, 104. 



Prosenchyma (irp6<;, near; eyx v t* a > an m ~ 

 fusion), characteristics of, 58, 76 ; in 

 the fascicular system, 102. 



Proteids, 28, 326, n.; formation of, in the 

 plant, 335. 



Protein basis, 46. 



Protein granules, 44; classification of, 

 in seeds, 182. 



Prothalli, 442, n. 



Protogeuic development (Trpwros, first; 

 yewdu, I produce), 99, n. 



Protophytes, 439, n. 



Protoplasm (n-pwro?, first ; TrAaa/ua, what 

 has been formed), amoeboid movement 

 of, 201; appearance of, 26; chemical 

 properties of, 197 ; circulation of, 199, 

 398 ; composition of, 28, 197 ; continuity 

 of, in cells, 214 ; discrimination between 

 living and dead, 10, 470, n. ; effect of 

 mechanical irritation upon, 208; ex- 

 amination of, 196, 198, 202; film of, 

 envelops many crystals, 54; historical 

 note regarding, 219; in young cells, 

 198; movements of naked, 200, 201, 

 397 ; movements of, dependent on the 

 absorption of moisture, 212, n. ; nitro- 

 gen in, 325 ; passage of, through imper- 

 forate cell-walls. 217; physical proper- 

 ties of, 197 ; rate of movements of, 

 200; reaction of, 198; relations of, to 

 anaesthetics, 211 ; relations of, to elec- 

 tricity, 207; relations of, to gravita- 

 tion, 209; relations of, to light, 206; 

 relations of, to moisture, 209 ; relations 

 of, to plasmolytic agents, 210; rela- 

 tions of, to temperature, 201; rela- 



tions of. to various gases, 210; rela- 

 tions of the cell-wall to, 218; rotation 

 of, 200; structure of, 211; tests for, 

 28; vitality of, in seeds and spores, 

 205; water contained in. 198, 257. 



Pulsation of vacuoles, 397. 



Pulvini (jndvinus, a- cushion), 160, 404, 

 410 ; continuity of protoplasm in the 

 cells of, 215; in the Sensitive plant, 

 420 ; in the Telegraph plant, 414. 



Putrefaction, results of, 333. 



Pyrenoids (p*ji', a kernel; eI6os, form), 

 "287, n. 



QUEKCITRIN (C3 3 H 30 7 ), 362. 



Quinia (C 20 H 24 N 2 2 + H 2 0), 327, 365. 



RADIAL BUNDLE, 104. 



Ptadial planes, 382. 



Radicle, 118; movements of the, 403: 

 structure of, 106. 



Rain-fall, effect of forests upon the, 

 282. 



Rain-water, gases in, 300, n. ; nitrogen 

 compounds in, 331. 



Ranvier's picrocarmin, 17. 



Raphides (pa</>is [gen. pa^tSos], a needle), 

 52. 



Razor, use of the, in section-cutting, 3. 



Reagents, 4; employment of r 6. 



Receptacles for secretions, 97, 110. 



Recording auxanometer, 383. 



Red anilin, 19. 



Rejuvenescence (re, again; juvenesco, 1 

 become young), the formation of & 

 single new cell from the protoplasm 

 of a cell already in existence. 



Repair of waste, 355. 



Reproduction, 425; by budding, 444 

 contrast between methods of, as re- 

 gards results, 443; in cryptogams, 

 439, n. ; methods of, 426. 



Reserve protein matters, 44. 



Resin-cells, 97. 



Resins, 98, 363; detection of, 12. 



Respiration, 355, 356, 367 ; accompanied 

 by evolution of heat, 370; contrasted 

 with assimilation, 356; early history 

 of, 367 ; influence of light and temper- 

 ature upon, 369 ; intramolecular, 370. 



Resting state, 369, 389, 459. 



Resurrection plant, 399. 



Retention of moisture by soils, 239. 



Reticulated markings, 30, 85. 



Reticulated venation in leaves, 156. 



