500 



INDEX 



springs, 250, 251; potassium as food, 

 318. 



Iodine, protoplasm, 4 ; growth, 317. 



Iron, and growth, 321-323. 



Irritable period in development, 379; 

 region in tendrils, 379. 



Isopoda, hydroxylamine, 15 ; formalde- 

 hyde, 21. 



Isotonic coefficients, 23. 



JACCARD, oxygen on plant growth, 305; 

 pressure and growth, 368. 



JANSE, salt-absorption, 88. 



JARIDS, growth and density, 362. 



JENSEN, geotaxis, 114-118, 121-124. 



JENTYS, oxygen and growth, 305 ; den- 

 sity and growth, 362. 



JOHNSON, hydrotropism, 256 ; geotro- 

 pism, 394. 



JONSSON, rheotaxis, 108 ; rheotropism, 

 387; light and germination, 425. 



JORDAN, analysis of water, 301. 



JUMELLE, water and growth, 253. 



KARSTEN, light and plants, 419. 



Katex type of electric response, 138. 



KELLER, retinal pigment and light, 192. 



KLEBS, phototaxis, 183. 



KLEIN, light fatal to fungi, 174. 



KLINGER, synthesis of organic com- 

 pounds, 163. 



KNIGHT, hydrotropism in roots, 256; 

 geotropism, 393. 



KNOWLTON, temperature and growth, 

 459. 



KNY, light and growth, 423. 



KOCH, free nitrogen as algae food, 309. 



KOCHS, desiccation and seed vitality, 

 63, 64. 



KOFOID, blastula cavity, 78, 79. 



KOSSOWITSCH. See KOCH. 



KRAFT, electricity on epithelium, 129. 



KRAUS, light on growth, 420 ; green 

 rays and growth, 430. 



Kreatin, chemotactic, 38. 



KRUKENBERG, strychnin, 25 ; quinine, 

 26; water in organism, 58, 295; 

 iron and growth, 321. 



KUHN, desiccation of nematodes, 61. 



KUHNE, effect on protoplasm of hydro- 

 gen, 5 ; chloroform, 9 ; veratrin, 24 ; 

 varying density, 75-77 ; electric cur- 

 rent, 129, 132, 138, 139; tempera- 



ture and movement, 225 ; heat-rigor, 

 231, 232 ; fatal temperature, 238 ; 

 cold-rigor, 241 ; cold, 242, 247, 248. 

 KUNKEL, iron as food, 323. 



Lactic acid, chemotactic, 38. 



Lamellibranchiata, electric stimula- 

 tion, 133 ; light reaction, 179. 



LANCE, desiccation of tardigrades, 61, 

 65. 



Land animals, acquisition of oxygen, 

 304 ; sulphur, 314. 



Larvse, food, 323 ; light, 418. 



LAURENT, nitrogen food of plants, 309, 

 312. 



LAWES, nitrogen as plant food, 310 ; 

 food of mammals, 330. 



LEBER, chemotaxis, 33. 



LE DANTEC, thigmotaxis, 105, 107. 



Leeches, poison, 15. 



Legumes, enriching action of, 310. 



LEITGEB, light and spores, 424. 



Lemna, organic food of, 327. 



LEMSTROM, electricity favors plant 

 growth, 408. 



LEONE, agitation of water and growth, 

 371. 



LESAGE, moisture and germination, 

 350, 351. 



Leucocytes, oxygen and protoplasm, 3 ; 

 chloroform, 10 ; quinine, 26 ; chemo- 

 taxis, 33 ; electric stimulation, 130. 



LEWITH, heat and coagulation, 255, 

 256. 



LIEBENBERG, light and germination, 

 425. 



LIEBERMANN, water of organism, 58. 



LIEBSCHER, free nitrogen as plant food, 

 312. 



Life, temperature-limits, 231. 



Light, methods, 154 ; monochromatic, 

 156-158 ; physical properties of dif- 

 ferent wave-lengths, 158, 159 ; in- 

 tensity, 160 ; chemical action, 161- 

 165 ; thermic effect on metabolism, 

 166-170 ; chemical effect, 170, 171 ; 

 vital limits, 171 ; and movement, 

 175 ; light-rigor, 178 ; and carbon 

 dioxide production in plants, 179; 

 phototaxis and photopathy, 180-210 ; 

 of chlorophyll, 189 ; of pigment, 192 ; 

 racial attunement, 197 ; period of 

 life, 197, 198 ; mechanics of response 



