177 



Longevity 



Leaven (Sour dough), II. 144, 217; III. 

 13, 69, 176, 179, 287; IV. 56, 57, 64, 69; 

 V. 101. 



Lebedeff's maceration juice, V. 220- 

 227. 



Lebenraib. IV. 292; V. 131. 



Leek (Prei), I. 286. 



Leguminosae, nitrogen fixation, see: Ba- 

 cillus radicicola and root nodules. 



Lelie : see Lily. 



Lenticularis wasp: heterogenesis, I. 190. 



— oviposition, I. 194-195. 

 Leptomine, IV. 11. 

 Leucin, II. 202. 



Leuconostoc Lagerheimii as the cause of 



the slime flux of trees, III. 259. 

 Leucodextrin, III. 137-140; V. 196. 

 Leucodiastase (Dextrinase), V. 22, 196. 

 Levain : see Leaven. ^ 



Levain alcoolique: see Yeast, mother 



yeast. 

 Levain butylique, III. 69, 70, see also: 



Granulobacter butylicum. 

 Levain de farine: see Leaven. 

 Levain lactique : see Yeast, mother yeast. 

 Lichen gonidia: description, II. 318; III. 



23-25. 



— fixation of f ree nitrogen. V. 135. 



— identity with Cystococcus humicola, 



II. 315, 316; III. 22; V. 288. 



— isolation and nutrition, II. 315-320; 



III. 23-25; V. 135, 288. 



Lichens: distribution on trunks, III. 23. 



— gall proliferations at, I. 1 1 ; II. 1. 



- — mutual parasitism of fungi and algae, 

 II. 316; III. 24. 



— production of litmus by fermentation, 

 V. 151. 



Lichtkever: see Luminous beetle. 

 Liesegang rings, V. 18, 27, 88*, 144, 



147. 

 Life: and structure, V. 138. 



— enzyme theory of living substance, 

 V. 138, 139. 



— latent, IV. 325-326. 



— of microorganisms, criteria for, III. 

 262; IV. 60, 75; V. 116, 117, 138. 



— theories about the origin of — on 

 earth, III. 159, 160; IV. 127, 128, 239, 



. 324-326, 332; V. 83, 135, 140. 

 Light: as the energy source in carbon 



dioxide assimilation, IV. 252; V. 229- 



230, 281. 



— influence on the anaerobism of Os- 

 cillaria, IV. 126. 



M. W. Beijerinck, Verzamelde Geschri 



Light : influence on the autotrophy of uni- 

 cellular green Algae, III. 294, 295; IV. 

 234, 379. 



— intensity, demonstration by means of 

 respiration figures in presence of green 

 plants, III. 38. 



— limiting factor in photosynthesis, IV. 

 252. 



— phototaxis of Chromatium, III. 40, 41. 



— produced by living organisms, II. 

 194-203, 204-209. 239-270-278-282; 

 III. 166; IV. 129-132, 194, 211; V. 

 199-216. 250-253; VI. 62, 77-79. 



— produced by living organisms, bio- 

 logical significance, II. 275-278; VI. 76. 



— wave length, influence on carbon 

 dioxide assimilation, II. 234, 302, 303; 



III. 38; IV. 130-131. 

 Lignifaction, II. 54; IV. 273, 277. 

 Lignified cell walls, V. 24. 

 Lignose, IV. 212, 213*, 252, 255. 

 Lily (Lelie), I. 103, 116, 118. 

 Limetree, (Linde, Lindenbaum), I. 49, 



91; III. 293. 

 Limiting factor, light in photosynthesis, 



IV. 252. 

 Lin: see Fiax. 

 Linde: see Limetree. 

 Lindenbaum: see Limetree. 

 Lipase. V. 273; VI. 4. 



Liquefaction : of agar agar, V. 6, 111, 

 145, 185. 



— of gelatin. II. 197. 199*, 200, 201, 

 229, 240-245, 248, 267, 269, 295. 299. 

 313, 328, 330; III. 20, 29, 32, 68. 180. 

 195, 248, 266-270, 283, 284, 286. 287, 

 317, 318, 320; IV. 39, 89, 93, 117, 148, 

 151, 226, 339; V. 5, 8, 9, 112, 153, 187, 

 189, 193*. 199, 266, 286; VI. 12, 71, 74. 



Liquid media, cultivation of colonies of 

 microorganisms in, IV. 321-323. 



Litmus : production from Lichens by fer- 

 mentation. V. 151. 



— reduction, II. 151 ; IV. 196, 286; V. 155. 

 Litmus micrococcus: colourless mutant, 



V. 155, 156. 



— of Schröter and C o h n. V. 149- 

 159. 



— production of alkali, V. 153. 

 Litmus milk reaction, IV. 286. 

 Liverwort, I. 11; II. 1. 

 Locust (Sprinkhaan), I. 296. 

 Longevity of cultures, living cells, seeds, 



spores, etc, II. 260, 268, 344-346; 

 III. 8. 89, 93, 161. 

 ften; Zesde Deel. 12 



