330 



INDEX. 



72 n. ; stimulation of Drosera 

 by touch, 208 ; by dilute solu- 

 tions, 208 ; on heliotropisrn, 

 180 ; on roots curving away 

 from injured side, 178 ; on 

 Sachs' curvature, 157 n. ; on 

 sleep of leaves, 223 n. ; on 

 transmission of heliotropic stim- 

 ulus, 183 n.; on twining plants, 

 229 n. 



Darwin, F., experiments on feeding 

 Drosera, 7'2n.; onthehornhygro- 

 scope, 102 ; on temperature of 

 leaves, 104; on growth of mus- 

 tard-roots in light and darkness, 

 162 ; on geotropism in Sorghum, 

 176 ; on the klinostat, 186, 189 



Darwin, F., and Bateson, A., on 

 stimulation of turgescent tissue, 

 135 n. 



Darwin, F. , and Phillips, R., on 

 transpiration, 79 ; on checking 

 transpiration current by com- 

 pression, 92 ; by incision, 94 n. 



Darwin, H., his form of recording 

 auxanometer, 153 ; his pattern 

 of klinostat, 186 ; his form of 

 Knight's machine, 169 ; design 

 of micrometer-screw, 150 n. ; 

 his horizontal microscope for 

 growth measurements, 153 



De Bary, on extrusion of water 

 under pressure, 78 n. 



Decapitation of roots, 173 



Deherain, on Boussingault's phos- 

 phorus method, 41 



De Saussure, on absorption of 

 water and salts by roots, 73; 

 on succulents, 13 



Desmodiuni gyrans. movements of, 

 332 



Detlefsen, on the amount of light 

 in rooms, 24 n. 



Detmer, on the appearance of 

 chloropbyll, 56 ; on dialysis, 

 124 ; on diffusion of gas through 

 epidermis, 49; on a drop-aspi- 

 rator, 4 ; on evolution of gas by 

 water-plants, 35 ; on shortening 

 of roots, 136 ; on spectroscopic 

 examination of chlorophyll solu- 



tion, 52 ; on succulents, 13 ; on 

 variability in swelling of seeds, 

 118; on water-culture, 58 



Devaux, on diffusion of gas in 

 water-plants, 36; method of 

 fixing a leaf into a funnel, 108 



De Vries, on epinasty, 198 n.; 

 on growth and plasmolysis, 148 ; 

 on hydrostatic pressure in tur- 

 gescent tissues, 130 ; on osmotic 

 strength of cell-sap, 126, 127; 

 on plasmolysis observed micro- 

 scopically, 125 n. ; on recovery 

 of flaccid shoot, 90 ; on short- 

 ening of roots, 136 



Dextrins, 276 ; general characters 

 of, 277 ; removal of, from solu- 

 tions, 281 



Diageotropism, of roots, 193 ; of 

 Narcissus flowers, 194 



Diaheliotropisin of leaves, 184 



Diastase, preparation of solid, 

 306 



Di astatic power of various extracts 

 and tissues compared, 306 ; use 

 of, in estimation of starch, 244, 

 291, 292. See also Ferments 



Differential thermometer, use of, 

 12 



Diffusion, through epidermis, 49 ; 

 experiments with dialyser on, 

 124 ; slowness of, 123 



Diphenylamin, test for nitrates, 67 



Dipsacus, roots, 136 



Drosera, benefitted by food, 72 ; 

 digestion of white of egg, 72 ; 

 stimulated by dilute solutions, 

 208; stimulated by inorganic 

 substances, 207 ; tentacles di- 

 rectly stimulated by meat, 207 



Dufour, on transpiration current 

 checked by incisions, 94 n. 



Dulcite, 284 



Dupre's process for estimating 

 alcohol, 279 



Echinocystis, tendrils of, 200 



Effervescent water, effect of on 

 evolution of gas, 36 



Elasticity, imperfect in plant-tis- 

 sues, 137 



Electricity, effect of, on Oxalis leaf, 



