314 



INDEX. 



Grand period of growth, 134, 135 



GrasB-haulma, geotropic curvature 

 in, 152; growth of pulvinus in 

 when fixed horizontally, 152 



Green on ferments, 283 



Griess' method for estimating ni- 

 trites, 240 



Gris on iron and chlorophyll-for- 

 mation, 49 



Growth, affected by light, 147, 148, 

 149 ; by temperature, 133, 143, 

 147 ; conditions of, 130 ; de- 

 pendent on full turgescence, 132 ; 

 distribution of in roots, 133, 

 134 ; in shoots, 134 ; elieot of 

 temperature on, 143, 144, 147; 

 lever used in measuring, 145 ; 

 measured by marks painted on 

 roots, &e., 132 n.; method of 

 measuring with vernier, 136; 

 oxygen a necessity for, 131, 132 ; 

 periodicity of, 149 ; and plas- 

 molytic shrinking, 135; region 

 of maximum coincides with 

 region of curvature, 150, 151 ; 

 and respiration, 144 



Gymnosperms, production of chlo- 

 rophyll in darkness by, 47 



Hanging drop, use of, in fungus 

 culture, 63 



Hartig on permeability of wood, 

 81 



Heat, effect of, on pigments, 45 ; 

 on sensitiveness of Mimosa, 187; 

 on tendrils of, 185 ; injurious 

 effect of, 10, 11 ; opening of 

 flowers produced by, 201; pro- 

 duced during imbibition, 107; 

 during respiration, 7, 8 



Hedera helix, variegated leaves of, 

 tested for starch, 19 



Heliotropic curvature, 165; stimu- 

 lus, transmission of, 167 



Heliotropism, negative, 166; trans- 

 verse, see Diaheliotropism 



Hemp, germination of, 8 ; used in 

 experiments, 295 



Hohnel von, on negative pressure, 

 80 



Hofmeister, on plasticity of geo- 



tropic roots, 154; on forcible 



curvature, 126 

 Hottonia, evolution of gas by, 30 

 Humulus lupulus, oxalate in, 58 ; 



twining of, 211 

 Hydrocharis, stomata of, 96 

 Hydrochloric acid, see Acids 

 Hydrometer, use of, 262-276 

 Hydrostatic pressure in turgesoent 



tissue, 118, 119 

 Hydrotropism, 197 

 Hygrometer, Stipa-awn used as, 94 



Imbibition, 101 ; affected by salt- 

 solution, 102, 104 ; by tempera- 

 ture, 102, 104; heat produced 

 during, 107 ; work done during, 

 107 

 Impatiens, root-pressure in, 71 

 Impatiens sultani, pith of, 123 

 Incisions, effect of, on transpiration 



current, 85 

 Induced curreat, see Electricity 

 Injection of leaves with water, 96 

 Injury, producing curvature in 



roots, 161 

 Intercellular spaces, connection 

 with stomata of, 95 ; with len- 

 ticels, 99 

 Internodes, torsion of, 180 

 Intramolecular respiration, 5, 6 

 Inulin, see Dextrine 

 Invertase, see Ferments 

 Iodine method of Sachs, 17 

 Iris, leucoplasts of, 30 

 Iron, necessary for chlorophyll pro- 

 duction, 48 ; producing curvature 

 in Phycomyces, 197 

 Isotonic coefficient, 117 

 Ivy, variegated leaves of, tested for 

 starch, 19 



Janse, his air-pump experiment 



(transpiration), 87 n. 

 Johnson's experiment on geotropic 



roots, 154 



Ejeldahl on diastase, 286 ; process 

 for estimation of nitrogen applied 

 to proteids, etc. 236 



Kleinia, bloom of, 99 



