692 



INDEX. 



Gemma of Marchantia (Fig. 49), 426 

 Gemmce of Fern-prothallia ; of Liver- 

 worts; of Mosses; of Sphacelarise, 



599 



Generative nucleus, 615 



Gentiana, absence of heliotropic irrita- 

 bility in, 43 1 



Geotropic curvatures, due to heteraux- 

 esis, 465, 467 ; mechanism of, 464, 580 



Geotropic irritability, 461 ; localisation 

 of, 467 ; phenomena of, in dorsiven- 

 tral, 469, 552 ; in isobilateral, 469; in 

 radial organs, 455; orthotropic, 455; 

 plagiotropic, 462 



Geotropism, 454 (Fig. 51), 593; after- 

 effect, 464; latent period, 435, 464; 

 negative, 458; positive, 458; trans- 

 verse, 463 ; reversal of, 459 



Gerland, on oxidation of chlorophyll in 

 light, 266 



Germination, 172, 626; changes in re- 

 serve-materials on, 173; evolution of 

 heat in (Fig. 37), 303 ; minimum tem- 

 perature of, 269; optimum tempera- 

 ture of, 277 ; effect of want of oxygen 

 on, 209 



Gilbert, on absorption of nitrogen, 85, 

 126 



Glands, 244 (Fig. 32); of carnivorous 

 plants (Fig. 33), 247 



Globoid, 170, 184 



Glucosides, 234 



Glutamin, 221 



Glycerin, 229 



Glycogen, 171 



Glycolignose, 21 



Godechens, on ash of Fucus, 61 



Godlewski 



on absorption of carbon dioxide, 73 

 on absorption of oxygen during 

 germination, 205 



on etiolated seedlings, 390, 392 

 on evolution of carbon dioxide by 

 plants, 201 



on evolution of oxygen, 143 

 on formation of oil drops in Mu- 

 saceae, 146 



on growth of leaves in darkness, 381 

 on starch-distribution, 163 

 on starch -grains in chlorophyll-cor- 

 puscles, 142 



Goebel, on adventitious budding in 

 Isoetes, 635 



Goldfussia anisophylla, movements of 

 style of, 545 



Gonium, pulsating vacuole of, 522 



Gonoplasm, 619 



Goppert 



on evolution of heat in germina- 

 tion, 303 



Goppert 



on germination at low temperature, 

 272 



von Gorup-Besanez 

 on ash of Trapa, 59 

 on asparagin in vetch-seeds, 1 74 

 on diastatic ferments, 189, 193 

 on peptic ferments, 173 



Graham, on osmosis, 40 



Grand period, of evolution of heat in 

 spathes, 308; of growth, 354 



Granulose, 183 



Gratiolet, on evolution of oxygen at 

 low temperature, 271 



Gravity; influence of, on direction of 

 growth (Fig. 51), 454; on rate of 

 growth, 409 



Gris, on chlorotic leaves, 136; on de- 

 velopment of chlorophyll-corpuscles, 

 136, 239; on etiolin, 240 



Grossmann, on motile Schizomycetes, 

 297 



Growing organs ; changes in irritability 

 of, 425, 429, 459; irritability of, 375; 

 mechanism of movements of, 573; 

 properties of, 341; structure of, 338; 

 tensions in, 342 



Growing point, metabolism of, 177; 

 structure of, 338 



Growth; axis of, 418; conditions of, 

 2 9 2 > 33 2 > correlation of, 391; daily 

 periodicity of (Fig. 45), 401 ; defini- 

 tion of, 291; direction of, 416; 

 changes in, induced by centrifugal 

 force, 460; by contact, 484; by gal- 

 vanic currents, 474 ; by gravity, 458, 

 463; by heat, 434; by light, 427; 

 by moisture, 477 ; by substratum, 475; 

 by water currents, 473 ; by weight, 

 507; spontaneous changes in, 360; 

 grand period of, 354 ; of lateral 

 branches, 421 ; mechanics of, 334; 

 mechanism of, 573 ; rate of, changes 

 in, induced by electricity, 410; by 

 gravitation, 409; by light, 393; by 

 pressure and traction, 410 ; spon- 

 taneous variations in, 358; 



Growth; relation of, to constructive 

 metabolism, 332 ; to destructive meta- 

 bolism, 292, 332 



Growth; of cell- walls, theories of, 15, 

 336; in darkness, 380, 385, 393, 588; 

 of internodes, 383; of leaves, 395; of 

 roots, 340; of starch-grains, 15, 336; 

 of stems, 339 



Guettard, on transpiration, 104, 105 



Guillemin, on formation of chlorophyll, 

 263 ; on heliotropism, 433 



Gum, 17 



Gum-resins, 236 



