INDEX. 



333 



Hohnel von, on negative pressure, 



86, 87 ; on permeability of mem- 

 branes, 88 

 Hofmeister, on plasticity of geo- 



tropic roots, 168; on forcible 



curvature, 138 

 Hoppe-Seyler on blood-method of 



showing oxygen evolution, 40 

 Hot stages, 16, 17 

 Hottonia, evolution of gas by, 35 ; 



for Engelmann's blood-method, 



40 

 Humulus lupulus, oxalate in, 66 ; 



twining of, 229 ; etiolated, 56 

 Hydrocharis, stomata of, 107 

 Hydrochloric acid, see Acids 

 Hydrometer, use of, 281—294 

 Hydrostatic pressure in turgescent 



tissue, 130, 131 

 Hydrotropism, 213 

 Hygrometer, Stipa-awn used as, 



102 



Imbibition, 112 ; affected by salt- 

 solution, 113, 116 ; by tempera- 

 ture, 113, 115 ; heat produced 

 during, 118; work done during, 

 118 



Impatiens, root-pressure in, 78; 

 stomata of, 106 



Impatiens sultani, pith of, 135 



Incandescent gas-light, for assimi- 

 lation, 36 



Incisions, effect of, on transpiration 

 current, 93 



Induced current, see Electricity 



Injection of leaves with water, 107 



Injury, producing curvature in 

 roots, 176 



Intercellular spaces, connection 

 with stomata of, 107; with len- 

 ticels, 110 



Internodes, torsion of, 196 



Intramolecular respiration, 10 



Inulin, see Dextrin s 



Invertase, see Ferments 



Iodine method of Sachs, 21 



Iris, leucoplasts of, 35 



Iron, necessary for chlorophyll pro- 

 duction, 56 ; producing curvature 

 in Phycomyces, 212 



Isotonic coefficient, 128 

 Ivy, see Hedera 



Janse, his air-pump experiment 



(transpiration), 96 n. 

 Johnson's experiment on geotropic 



roots, 167 



Kjeldahl on diastase, 304; process 

 for estimation of nitrogen applied 

 to proteids, etc. 255 



Kleinia, bloom of. 111 



Klinostat, theory of action of, 186 ; 

 use of in studying diaheliotro- 

 pism, 186; used for exclusion 

 of heliotropism and geotropism, 

 196 ; vertical, for growth experi- 

 ments, 161 



Knight's centrifugal experiment, 

 168 



Knop on water culture, 59 n. 



Konig on oils and fats, 261 



Kohl's method of recording absorp- 

 tion of transpiring plant, 83 ; on 

 light affecting transpiration, 85, 

 85 n. ; on a2)heliotropism of 

 bean roots, 157 n. 



Krabbe on diaheliotropism, 189. 

 See also Schwendener 



Lambert and Butler, their tobacco 

 tins used as flower pots, 98 



Laminaria, brown pigment of, 53 ; 

 imbibition of, 112 



Lamium, diaheliotropism, 184 



Land-plants, leaves of, do not 

 assimilate under water, 26 ; cul- 

 ture of without COo, 29 



Leaf, injected, alfected by heat 

 more easily, 14 



Leaves, drooping in frost, 178; 

 form of, affected by sun and 

 shade, 57; injected by frost, 

 108; injection of with water, 

 107; sleep of, 221-223; ter- 

 restrial, do not assimilate under 

 water, 26; variegated, tested 

 for starch, 23; nitrates and 

 oxalate in, 66, 67 



Leitgeb, on movement of stomata, 

 110 n. 



