340 



INDEX. 



Tropaeolum, used in experiments 

 on iodine method, 21, 25, 29 ; 

 on sugars, 288 



Tschirch, on action of copper on 

 chlorophyll, 52 



Tulip, opening and closing in re- 

 sponse to changes of tempera- 

 ture, 219 



Turgescence and growth, 132 



Turgescent shoot, rigidity of, 139 



Turgor, 125 



Twining plants, 229 



Ulmus campestris, oxalate in, 66 ; 



horizontal branches of, 196 

 Uredineae, culture of, 70 



Valerian, used in experiments on 

 growth, 147 ; on growth-curva- 

 ture, 164 



Variegated leaves tested for starch, 

 23 



Varnish, photographic, for marking 

 growing parts, 144 



Velten, his hot-stage, 17 



Veronica, diaheliotropism of, 184 



Vessels, blocking of, by cocoa- 

 butter, 92 ; by particles sus- 

 pended in water, 86, 87 



Vincetoxicum, pollen of for chemo- 

 taxis, 218 



Vines, on epinasty, 198 n. ; on 

 use of microscope for growth 

 measurements, 152 n. ; on 

 growth of Phycomj'ces in light 

 and darkness, 161 



Vochting, on diageotropic flowers, 

 194 ; on diaheliotropism, 189 ; 

 on rectipetality, 191 



Von Hohnel, see Hohnel 



Vries, see de Vries 



Waage, on Phloroglucin, 269 

 Wanklyn's albuminoid ammonia 



process applied to proteids, etc. 



254 

 Ward, Marshall, on hanging-drop 



culture, 70 n. 

 Water, absorbed by dead roots, 78 ; 



absorption of, by transpiring 



plant, 79 ; -culture, 58 ; ex- 



trusion under pressure of drops 

 of, 78; free from COo, appara- 

 tus for preparing, 28 ; use of 

 in extraction, 243, 245 



Water-cress, used in De Saussure's 

 experiment, 74 



Water-plants, culture of without 

 CO.,, 28; evolution of gas by, 

 35 ^ 



Wax-mixture, 3 n. 



Weigelia, torsion of internodes in, 

 196 



Weight, gain of, in assimilating 

 leaves, 31 



Wheat, used in experiments on 

 starch, 294 ; on phosphates, 302 



Wiesner, on appearance of chloro- 

 phyll, 54 n. ; on the effect of 

 light on chlorophyll, 51 n. ; on 

 heliotropism, 181 n. 



Wind, effect of, on transpiration, 

 84 



Winkler-Hempel, method of gas- 

 analysis, 7, 44 



Withering, effect of on stomata, 

 106 ; mercury-pressure produc- 

 ing recovery from, 90 



Wolkoff, on effect of light on as- 

 similation, 37 



Wood, area of, greater than needed 

 for transpiration current, 93 ; 

 filtration of emulsion through, 

 91 ; injection of, by cocoa- 

 butter, 92 ; permeability of, by 

 air and water, 88, 89 ; swelling 

 against a weight, 118 ; young, 

 permeability of, by water, 88 



Wortmann, on light affecting nu- 

 tation of epicotyls, 199 ; on 

 intramolecular respiration, 10 ; 

 on water-culture, 59 n. 



Yeast, used in experiments on 



enzymes, 306, 308 

 Yew, development of buds of, 197 



Zea, stomata of, 106 

 Zimmermann, on the diphenylamin 



reaction for nitrates, 67 n. 

 Zopf, nutritive solutions for fungi, 



68 n. 



CAMBRIDGE: PRINTED BY J. & C. F. CLAY, AT THE UNIVERSITY PRESS. 



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