348 



INDEX 



Haas and Hill, Chemistry of plant products, 6, 19, 



21, 30, 155. 157, 187 

 Haberlandt, on water secretion, 140; on light per- 

 ception, 281; on geotropic perception, 296, 297; 

 on Mimosa, 316 

 Habit, 275 



Hahn, see Buchner, Buchner and H. 

 Hales, Staticks, 135, 140, 141 

 Hall, Rothamsted experiments, 73 

 Halliburton, Chemical physiology, 155 

 Halophytes, 17, 36 

 Hamar, 290 



Hamburger, on osmotic pressure, etc., 119 

 Hammarsten, Physiological chemistry, 155 

 Hansen, on acetic acid bacteria, 230; on yeast cul- 

 ture, etc., 44-46, 59. 201, 205 

 Hanson, on phycoerythrin, 21 

 Hansteen, on protein formation, 180 

 Hanstein, on transfer of organic substances, 148 

 Harden and Noriis, on reducing enzymes, 208; H. 



and Young, on alcoholic fermentation, 202 

 Harrington, see Hibbard and H. 

 Harris and Lawrence, on osmotic values of ex- 

 pressed juices, 124 

 Hartig, on transpiration, 137; on ascent of sap, 143; 



on asparagin and seed germination, 170 

 Hartley, see Berkeley and H. 

 Haselhoff and Lindau, on smoke injury, 262 

 Hasselbring, on salt absorption and transpiration, 



148, 271, 273 

 Hatchek, on colloids, n 1 

 Haushofer, on microchemical analysis, 90 

 Hawkins, see Livingston and H. 

 Hay bacillus and hay infusion, 300 

 Hazel, 256, 258 



Heat, xxviii, 15, 50, 200, 219, 220; liberated in res- 

 piration, 218-220 

 Hedera, 276 



Hegler, on strains as stimuli, 302, 303 

 Heine, on starch sheath, 149 

 Helianthus (see also sunflower), 34, 141, 165, 184, 



191. 324. 325, 336 

 Heliophilous and heliophobous plants, 27 

 Heliotropism (see also phototropism), 275 

 Helleborus, 288 



Hellriegel and Wilfarth, on nitrogen assimilation, 75 

 Helmont, van, on sources of plant material, xxvii; on 



spontaneous generation, 52 

 Hematoporphyrin, 11- 13 

 Hemicelluloses, 185, 186, 19? 

 Hemin, 12 



Hemoglobin, 7, 11, 12 

 Hemopyrrol, 12 

 Hemp, 158, 159, 184. 303 

 Hemus, see Wahl and H. 

 Henri, see Cernovodeanu and H. 

 Heracleum, 124 

 Heredity, xxxi 



Herlitzka, on colloidal chlorophyll, 11 

 Hettlinger, on protein formation and wounding, 



180 

 Hexose, 31 

 Hibbard and Harrington, on freezing-points of 



triturated tissues, 124 

 Hseracium, 279 



Hiestand, on phosphatides, 183. (See also Winter- 

 stein and H.) 



Hilgard, Soils, 92 



Hill, A. C, on reversible zymohydrolysis, 168 



Hill, T. G., see Haas and H. 



Hiltner, see Nobbe and H.; Nobbe, Schmid, H. and 



Hotter. 

 Hinze, on sulphur bacteria, 51 

 Hipfiuris, 249 

 Histidin, 160, 161, 175 

 Histones, 162 



Höber, Physikalische Chemie der Zelle, 119, 154 

 Hocheder, see Willstätter and H. 

 Hoff, Van't, Theoretical chemistry, 35; on osmotic 



pressure, 117, 118 

 Hoffman, on calamin violet, 87 

 Hofmeister, on ascent of sap and bleeding, 141; on 



the cell, 154, ISS. 316 

 Höhnel, on gas in stems, 132, 144 

 Hölle, on oil in Strelitzia, 29; on wilting, etc., 145 

 Hop, 46, 282, 285, 311 



Hoppe-Seyler, on fermentation in soils, etc., 198 

 Hordein, 158 



Hordeum (see also barley), 159, 164, 253 

 Hormones, 170, 188, 298, 329, 330-331. 336 

 Horn, see Morse and H. 

 Horowitz, on pigments, 7 

 Horse-chestnut, 19 



Hotter, see Nobbe, Schmid, Hiltner and H. 

 Hoyer, on lipolytic enzymes, 166 

 Hubbenet, see Kostychev and H. 

 Hug, see Willstätter and H. 

 Humidity, of air, and transpiration, 139, 263 

 Humulus (see also hop), 282, 311 

 Humus, 93, 98 

 Hungerbiihler, on starch formation and proteins 



in unripe potato tubers, 185 

 Huni, see Willstätter and H. 

 Hydathodes, 139 

 Hydnora, 47 

 Hydrangea, 36, 87 

 Hydrocharis, 165 

 Hydrogel, 189 



Hydrogen, xxviii, 14, 49, 50, 51, 79, 105, 163, 

 189-191, 199, 200, 207-210, 223-226, 231; 

 acceptors of, 224-226; peroxide, 58, 164, 167, 

 168, 223, 226; sulphide, 42, 48-49, 164, 177, 198, 

 231 

 Hydrogenase, 168 

 Hydrogenomonas, 51 

 Hydrolysis (see also enzymes), 159, 164, 166, 172, 



189, 191, 218, 220 

 Hydroquinone, 187, 225 

 Hydrosol, 189 

 Hydrotropism, 274 

 Hydroxyl, 189 

 Hydroxy-prolin, 160 

 Hyponasty, 316 

 Hypoxanthin, 162, 173, 175, 176, 177 



Illumination, one-sided, 275 



Imbibition, in cell walls, 144, 146, 147; in bladder 



membrane, 111 

 Imidazol, 160, 163 

 Immunization, 182 

 Impaliens, 140, 261 

 Indican, 187 



