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 

 Hygroscope made of horn, 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 Dextrins 



Invertase, see Ferments 



Iodine method of Sachs, 21 



Iris, leucoplasts of, 35 



Iron, necessary for chlorophyll pro- 

 duction, 56 ; producing curvature 

 in Phycoinyces, 212 



Isotonic coefficient, 123 

 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 apheliotropism 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 C0 2 , 29 



Leaf, injected, affected by heat 

 more easily, 14 



Leaves, temperature of, 104; droop- 

 ing in frost, 178; form of, affected 

 by sun and shade, 57 ; injected 

 by frost, 108; injection of with 

 water, 107; sleep of, 221-223; 

 terrestrial, do not assimilate 

 under water, 26; variegated, 

 tested for starch, 23; nitrates 

 and oxalate in, 66, 67 



Leitgeb, on movement of stomata, 

 110 n. 



