704 



INDEX. 



Sachs 



on absorption : of ammonia by 

 leaves, 86 ; of insoluble substances 

 by roots (Figs. 10, n), 55; of water 

 by aerial roots, 50; of water by 

 roots, 52 



on anisotropic organs, 424 



on cystoliths, 11 



on distribution of roots in soil, 5 1 



on etiolation, 385 



on geotropism : action of gravity at 

 different angles, 459; curvature, 465; 

 of lateral roots, 462 ; positive of 

 rhizomes, 458 



on growth : daily period of (Fig. 

 45)> 40i; grand period of, 355; of 

 grass-haulms, 333; in length, 338; 

 irregularities in rate of, 358 



on growing organs : influence of 

 decapitation on roots, 468 ; of light 

 on )3935 of pressure on, 410; physical 

 properties of, 341 ; tensions in, 343 



on heliotropism : influence of di- 

 rection of incident rays, 432 ; of 

 leaves, 444; on negative of March- 

 antia, 443 ; reversal of heliotropic 

 properties, 429 



on hydrotropism, 477 



on imbibition, 38- 



on induction of dorsiventrality by 

 light, 425 



on metabolism : distribution of or- 

 ganic substances, 163, 164, 166, 188; 

 formation of chlorophyll, 156, 262, 

 270; formation of colouring matters 

 of flowers in darkness, 267 ; germi- 

 nation of oily seeds, 173 ; of growing 

 point, 177; influence of light on 

 chlorophyll-function, 258; loss of 

 weight in darkness, 253; oxidation of 

 chlorophyll, 264, 266; silicon in food, 

 137; starch -grains in chlorophyll- 

 corpuscles, 141 ; tannin, 235, 237 



on movement: of chlorophyll-cor- 

 puscles, 527; of Mimosa; effect of 

 darkness on, 549; effect of drought 

 on, 538, 549; influence of light on, 

 539 persistence of, in darkness, 544 



on normally etiolated shoots, 385 



on phototonus, 380 



on proper angle of lateral roots, 42 1 



on soil : hygroscopic water in, 48 ; 

 relation of root hairs to (Figs. 10, u), 

 47 ; retention of water by, 48 



on somatotropism, 475 (Fig. 52) 



on temperature: death caused by 

 high, 278 ; by low, 273 ; relation of, 

 to decomposition of carbon dioxide, 

 271; to formation of chlorophyll, 270; 

 to germination, 277; to growth, 294; 



Sachs 



to movements of motile leaves, 298 ; 

 to rotation of protoplasm, 297 

 on torsion, 353 



on transmission of stimuli in Mi- 

 mosa, 583 



on transpiration: affected by sub- 

 stances absorbed by roots, no; af- 

 fected by temperature of soil, 109; 

 loss of water by, 104; periodicity of, 

 114; relation of, to absorption, 115 



on transpiration-current ; proper- 

 ties of lignified cell- walls, 21, 97; 

 rate of, 99 ; theory of, 97 



on twining of tendrils, 489 

 Sachsse 



on absorption of oxygen during 

 germination, 205 



on conversion of chlorophyll into 

 starch, 156 



on conversion of starch into etio- 

 lin, 241 



on starch, 183 



on loss of weight during germi- 

 nation, 204 



Sadebeck, on vegetative apogamy, 60 r 

 Salicin, 234 

 Salicylous acid, 235 

 Saligenin, 235 

 Salomon, on xanthin, 221 

 Saltatory evolution, 68 1 

 Salts, absorption of, 57 

 Sambucus nigra, lenticel of (Fig. 14), 71 

 Sanderson- 

 oil electrical condition of Dionoen, 

 321, 324 



on loss of irritability in Dionoea 

 due to fatigue, 550 



Sanio, on starch as reserve-material, 171 

 Santonin, 243 

 Saprolegnieae, parthenogenesis in, 665 ; 



reproduction of, 619 

 Sarracenia, pitcher of, 247 

 de Saussure 



on absorption of carbon dioxide by 

 plants, 81; of nitrogen, 85 



on absorption of oxygen, by flowers, 

 77; by leaves, 79; by plants, 179; 

 by roots, 78 ; by seeds, 76 

 on absorption by roots, 57 

 on dephlogistication of air, 141 

 on destructive metabolism, 292 

 on effect of carbon dioxide on life, 



73 



on effect of oxygen on life, 75, 211 

 on evolution of oxygen, 142 

 on exhalation of carbon dioxide by 



germinating seeds, 198 



on exhalation of oxygen in light, 



231 



