494 



GLOSSARIAL INDEX. 



Potassium, occurrence of, in plants, 2i7; 



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 

 germinati(m, 309, 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, u., 220. 

 Procambium, 104. 



Prosenchyma (n-pd?, near; eyxviia, an in- 

 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. 

 Protogenic development (irpuros, first; 



yevfoM, I produce), 99, /i. 

 Protophytes, 439, n. 

 Protoplasm (irpSiTo^, first; TrAacr/xa, what 

 has been formed), amoeboid movement 

 of, 201; appearance of, 26; chemical 

 properties of, 197; circuliition 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, 106, 198, 202; film of, 

 envelops many crystals, 54; historical 

 note regarding, 219; in young cells, 

 198; movements of naked, 2(10, 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, 21)0; structure of, 2U; tests tor, 

 28; vitality of, in seeds and spores, 

 205; water contained in, 198, 257. 



Pulsation of vacuoles, 397. 



Pulvini (pulvinus, a cushion), 160, 404, 

 410 ; continuity of protoplasui in the 

 cells of, 215; "in the Sensitive plant, 

 420 ; in the Telegraph plaut, 414. 



Putrefaction, results of, 333. 



Pyrenoids (impiji', a kernel ; elSos, form), 

 287, n. 



QUEKCITKIN (C33H30O,), 362. 



Quinia (CaoHaNzO^ -|- HjO), 327, 365. 



Radial bundle, 104. 



Radial planes, 382. 



Radicle, 118; movements of the, 403: 

 structure of, 106. 



Rain-fall, efliect of forests upon the, 

 282. 



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

 compounds in, 331. 



Ranvier's picrocarmin, 17. 



Raphides {pait-ii [gen. pa<f>i5os], a needle), 

 52. 



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



Reagents, 4; employment of, 6. 



Receptacles for secretions, 97, 110. 



Recording auxaiiometer, 383. 



Red anilin, 19. 



Rejuvenescence (re, again ; juvenesoo, 1 

 become young), the formation of a 

 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, ■«.; methods of, 426. 



Reserve protein matters, 44. 



Resin-cells, 97. 



Resins, 98, 36:!; detection of, 12. 



Respiration, 355, 356, 367 ; accompanied 

 by evoluti' n of heat, 370; contrasted 

 with assimilation, 356; early history 

 of, 367; influence of light and temper- 

 ature upon, 369 ; intramolecular, 370. 



Resting state, 3(19, 389, 459. 



Resiu'rection plant, 399. 



Retention of moisture by soils, 239. 



Reticulated markings, .'iO, So. 



Reticulated venation in leaves. 156. 



