191 



Root nodules 



Resistance : of bacterial spores to alcohol, 



III. 91, 303. 



— of bacterial spores to alkali, IV\ 94, 

 97. 



— of bacterial spores to drying, III. 91 ; 



IV. 325. 



— of bacterial spores to temperature, II. 

 299; III. 64, 71, 78, 91, 93, 315, 316; 

 IV. 15, 85, 89, 90, 94, 96, 111, 115. 116, 

 141, 147, 149, 150, 152, 160, 161. 224, 

 325, 327; VI. 7. 9-11. 73. 



— of plants to climatic change and to 

 diseases, I. 35; III. 162. 



— of yeast and yeast spores to drying at 

 high temperature, III. 257, 260-262, 

 279-282, 285. 287-289; V. 117, 164. 165. 



Respiration: I. 149; II. 147; III. 26-42, 

 45-47. 84, 112, 118, 123*. 125. 126. 

 165-168, 246. 313-322; IV. 96. 116. 

 121. 147, 150. 151, 153. 176, 193, 202, 

 207, 245, 352; V. 7, 203, 232; VI. 23, 

 27, 78. 



— ammonia as a product of, V. 7. 



— conditions, influence. see: Oxygen. 



— enzyme, V. 7. 206. 215. 



— fermentation as a special form of. II. 

 147; VI. 10, 78. 



— intramolecular, IV. 193, 194. see 

 also: Fermentation. 



— protoplasm, IV. 193. 



— protoplasm, as a complex of oxidases, 

 oxidones and peroxidases. V. 252. 253. 



— quotiënt, I. 149; V. 232. 

 Respiration figures: III. 26-27, 28-42*, 



45-47, 77, 83, 84, 112, 118, 123*, 125. 

 126. 246. 313-315-318-319-321; IV. 

 96. 116, 121, 147. 150, 151, 153, 176. 

 202. 207, 245, 352; V. 203; VI. 23. 



— and emulsion figures, IV. 246; V. 203. 



— apparent, caused by concentration 

 of foodsubstances in a certain layer. 

 III. 44. 118, 125, 319. 



— apparent, caused by specific weight, 

 III. 34. 



— between slide and coverglass, III. 

 35-42. 313-322; IV. 96, 116, 121, 147. 

 150, 151, 153. 176. 202. 207, 245, 352; 

 V.203; VI. 23. 



— between slide and coverglass, im- 

 proved method, IV. 153. 



— in a chalk agar tube, III. 321. 



— in photosynthetic experiments, III. 

 38. 



— influence of sulphuretted hydrogen, 

 III. 40. 41. 



Respiration figures : preparation, how to 

 avoid streaming. III. 26-28. 33. 



Retinispora forms of Cupressaceae, II. 

 283-292. 



Retting of flax : bacterial action, IV. 212- 

 216. 217-228; V. 91; VI. 11. 



— Chemical, IV. 215. 



— dew. IV. 215. 



— in streaming water, significance, IV. 

 218-221. 



— influence of salpetre and sulphuretted 

 hydrogen, IV. 220. 



— technical, IV. 222-227. 



— white and blue. IV. 215. 



— with pure cultures. IV. 216, 217, 220. 

 222. 224. 



Rhamnose. dissimilation, VI. 13. 

 Rhaphidiutn naviculare, description. II. 



229. 

 Rhizoids, II. 112. 



Rhodites, oviposition, I. 25, 256-258. 

 Rice (Riz). III. 65; V. 195. 

 Rijzers (swell). in cheese. control, III. 



347; IV. 29, 288; V. 235. 

 Ring: disease of hyacinths, I. 285. 



— formation in auxanograms, III. 31; 

 V. 18. 



— formation of Actinomyces, V. 27, 88*. 

 Rings of Liesegang, V. 18. 27,88*, 



144, 147. 



— of Newton, II. 168, 181; IV. 84. 

 102; V. 247, see also: Irisation. 



Riz: see Rice. 



Rötheln (becoming red of peach bran- 

 ches), I. 337. 



Rogge: see Rye. 



Roggeaaltje: see Rye eel. 



Roggegras: see Rye grass. 



Root buds: see Buds, adventitious at 

 roots. 



Root disease, II. 139. 



Root formation, theor>^ I. 395, 396, 397; 

 II. 128-131; V. 256. 



Root nodules: as metamorphosed lateral 

 roots. II. 156. 158; IV. 259. 



— Bacillus polymyxa in the bark, VI. 12. 

 15. 



— compared with galls, I. 12; II. 157, 

 158. 171, 178, 182. 



— description, II. 156-162, 172, 173, 

 182, 186*, 187*; III. 49-53; IV. 259. 



— enzymes in. VI. 70. 



— exhaustion by bacteria, II. 156. 159, 

 161. 173-176. 178. 182, 187, 323; III. 

 50, 51; VI. 61. 



