312 



INDEX. 



Knight's machine, 156; design 

 of micrometer-sorew, 138 n. ; 

 his horizontal Microscope for 

 growth measurements, 140 



De Bary, on extrusion of water 

 under pressure, 70 n. 



Decapitation of roots, 159, 160 



D6herain, on Boussingault's phos- 

 phorus method, 34; demon- 

 stration of evolution of oxygen, 

 35 



De Saussure, on absorption of 

 water and salts by roots, 66 ; 

 on succulents, 9 



Desmodium gyrans, movements of, 

 214 



Detlefsen, on the amount of light 

 in rooms, 20 



Detmer, on dialysis, 112 ; on 

 diffusion of gas through epi- 

 dermis, 42; on evolution of 

 gas by water-plants, 31; on 

 shortening of roots, 124; on 

 spectroscopic examination of 

 ohlorophyU solution, 45 ; on 

 variability in swelling of seeds, 

 107 ; on water-culture, 51 



Devaux, on diffusion of gas in 

 water-plants, 31 ; method of 

 fixing a leaf into a funnel, 97 



De Vries, on epinasty, 182 n., 

 183 n.; on growth and plas- 

 molysis, 135 ; on hydrostatic 

 pressure in turgescent tissues, 

 118 ; on injection of tendrils, 

 185 ; on osmotic strength of 

 cell-sap, 114, 117 ; on recovery 

 of flaccid shoot, 82 ; on short- 

 ening of roots, 124 



Dextrins, 258 ; general characters 

 of, 259 ; removal of, from solu- 

 tions, 263 



Diageotropism, of roots, 177 ; of 

 Narcissus flowers, 178 



Diaheliotropism of leaves, 168 



Diastase, preparation of solid, 

 288 



Diastatio power of various extracts 

 and tissues compared, 288 ; use 

 of, in estimation of starch, 226, 

 273, 274. See also Ferments 



Diffusion, through epidermis, 42; 

 experiments with dialyser on, 

 112 ; slowness of, 112 



Diphenylamin, test for nitrates, 59 



Dipsacus, roots, 124 



Drosera, benefltted by food, 65 

 digestion of white of egg, 64 

 stimulated by dilute solutions, 

 193 ; stimulated by inorganic 

 substances, 192 ; tentacles di- 

 rectly stimulated by meat, 191 



Dulcite, 266 



Dupr6's process for estimating 

 alcohol, 261 



Echinocystis, tendrils of, 184 



Elasticity, imperfect in plant-tis- 

 sues, 125 



Electricity, effect of, on OxaUs leaf, 

 15 ; on stomata, 99 ; on circu- 

 lating protoplasm, 16 



Elfving, on behaviour of grass- 

 haulms on the Klinostat, 176 ; 

 on diageotropic runners, 178; 

 on etiohn, 47 ; on injection of 

 vessels with cocoa-butter, 83 ; 

 on iron and chlorosis, 49; 

 nutritive solution for fungi, 60 n. ; 

 on Phyoomyces curving towards 

 iron, 197 ; on heliotropism over- 

 coming geotropism, 167 



Elodea, assimilation of sugar by, 

 28 ; circulating protoplasm in, 

 12 ; used in assimilation ex- 

 periments, 19, 26 ; in experi- 

 ments on metabolism, 295 



Emulsion, filtering of through 

 wood, 88 



Bngelmann, on blood-method of 

 demonstrating oxygen, 34 



Engehnann's bacterial method, 41 



Enzymes, see Ferments 



Eosin, rapid absorption of under 

 negative pressure, 80; used to 

 show transpiration current in 

 incised branches, 86 



Epicotyls, nutation of, affected by 

 light, 183 



Epinasty, 182 



Epinasty and geotropism, 182 



Eranthis hiemalis, stomata, 96 



