161 



Cytospora 



Cream, microorganisms of sour, IV. 55, 

 289, 290, 317; V. 101, 158. 



Crystals, liquid, V. 198. 



Cucumber eels, II. 143. 



Cultivated plants, improvement, I. 359- 

 366, 401-408, 415-426; II. 189. 



Cultivation : alteration of characters dur- 

 ing, II. 239-242, 251, 260; III. 8, 21, 

 56, 262, 263, 278-292; IV. 38, 39, 89, 

 116, 141, 144, 147-149; V. 34, 199, 200, 

 204, 288. 



- alternative, IV. 143, 164, 165, 175. 



- anaerobic, see anaerobic culture. 



- of colonies of microorganisms in liquid 

 media, IV. 321-323. 



Cultures: combined, Algae with bacteria 

 or yeast, II. 235, 299. 



- combined, Cyanophyceae and Diatoms, 

 IV. 107. 



combined, of anaerobic and aerobic 

 organisms, see: anaerobic culture. 



- elective, enrichment, selective, sepa- 

 rative, see: Isolation. 



- influence of aeration, IV. 183, 185, 

 188. 



- longevity, II. 260, 268, 344-346; III. 

 8. 



- of Algae, purification, II. 232, 294, 

 317 



- of microorganisms in a gas atmosphe- 

 re of constant pressure or constant 

 volume, IV. 377*, 380. 



- of microorganisms in gas atmosphere, 

 research of gas consumption, IV. 373*, 

 374. 



- preservation in dried condition, II. 

 346; V. 35. 



- prevention of atavism, degeneration, 

 mutation, variation, IV. 38, 40-46, 89, 

 141, 142, 287, 333, 334, 338, 340; V. 

 42, 49, 51, 56, 66-68, 70, 104. 



Cumarine, IV. 12. 



Currants (Bes, Groseille, Korinthe, Krent), 



III. 54, 55-57, 176, 178, 179, 185, 



186, 258, 260, 261, 287; IV. 40; V. 



62, 167. 

 Cuttings, II. 8, 11, 24,33,34,284-289- 



292; V. 78. 

 Cyanides, reduction of complex by 



microorganisms, IV. 196, 197. 

 Cyanophyceae: see Algae blue. 

 Cynipidae: anatomy, VI. 49-57*. 



- appearance, I. 155; III. 207-209, 231. 



- excretion of odoriferous products, I. 

 175; VI. 50. 



Cynipidae: experimental change of the 

 host plant III. 202, 203. 



- glands, VI. 50, 54. 



- heterogenesis, I. 150-155, 174, 175, 

 190, 201, 236, 237; II. 124, 125; III. 

 199-231; IV. 133-138. 



- hybridisation experiments, I. 263; II. 

 127. 



- oviposition, I. 144, 145-149, 165-181, 

 194, 195, 202, 209, 223-225, 234-237, 

 251, 256, 257, 268, 269, 273*-281*; II. 

 124-126; III. 206, 210,211,223-225, 

 232*; IV. 134; VI. 49-57*. 



- parthenogenetic and sexual genera- 

 tions possibly belonging together, IV. 

 136, 137. 



Cynips calicis: gall formation, III. 199, 

 204, 225-227. 



- the asexual generation of Andricus 

 cerri, III. 199-231. 



Cynips Kollari, the asexual generation of 

 Andricus circulans, IV. 134, 135. 



Cystococcus humicola: identity with the 

 gonidia of Lichens, II. 315, 316; III. 

 22; V. 288. 



- occurrence, II. 316; III. 23. 



- photosynthesis, influence of the culti- 

 vation on organic media, III. 295; V. 

 288. 



Cytase: IV. 217, 272; V. 169, 224, 225. 



- in yeast during budding, V. 225. 

 Cytase like action by Lactococcus aggluti- 



nans on yeast, IV. 318, 319. 

 Cytese, an endoenzyme with synthetic 



action, VI. 14. 

 Cytisus Adami: atavism, IV. 49-52, 305- 



307*-312. 



- bud variants, IV. 48, 49*, 50, 51*, 52, 

 305-307*-310, 311, 312. 



- mixed flowers and leaves, IV. 308, 

 309. 



- traumatic excitation, IV. 311, 312. 

 Cytisus laburnum, origination at Cytisus 



Adami, IV. 306, 310. 



Cytisus puYpuveum, origination by ata- 

 vism at Cytisus Adami, IV. 51*, 305- 

 307*-312. 



Cytogamy as a nutrition process, V. 66, 

 67. 



Cytolysine, V. 169, 175, 177. 



Cytolysis, IV. 271, 272, 273; V. 169, 173. 



Cytoplasm, role in reproduction, II. 15, 

 20, 105. 



Cytospora on cherry and plum trees, IV. 

 275, 276. 



M. W. Beijerinck, Verzamelde Geschriften ; Zesde Deel. 



11 



