203 



Yeast 



Wasp (Guêpe, Wesp, Wespe). I. 134. 135; 



II. 126; III. 55. 199-225; IV. 231; V. 



166; VI. 52. 

 Water, see : Distilled and Drinking — . 



— biological purification, IV. 250; V. 20. 



— flora, IV. 27, 28. 

 Water bacteria, III. 7, 112. 

 Water blooming, IV. 106. 

 Water flea (Watervloo), V. 122. 

 Watervloo: see Water flea. 



Waxy layer, relation between the quan- 

 tity of germs on a leaf and its rate of 

 humidity, IV. 275. 



Weeping elm (Treuriep), I. 312. 



Weide: see Willow. 



Weidenraupe : see Goatmoth. 



Weintraube : see Grape. 



Weiszbier, IV. 56. 



Weizen : see Wheat. 



Wespe : see Wasp. 



Weverskaarde: see Teasel. 



Wheat: (Froment, Tarwe, Weizen), I. 

 17, 58-60, 311. 327, 361. 363. 364. 402- 

 408. 415. 417-425; III. 64. 65. 129. 

 137. 139, 151, 152, 176, IV. 274; V. 83. 

 195-198. 243. 244. 275; VI. 80-86. 



— hybrid from Triticum monococcum ? 

 X Triticum dicoccum 3, I. 401-405- 



408, 415-426; VI. 82. 



— original wild form, I. 406-408, 419- 

 424-426; VI. 80-86. 



Wheat eel (Tarweaaltje), I. 17, 18. 

 Whey, ropy: II. 350, 351, 353, 357; III. 



173; IV. 38. 55, 286. 288, 317, 318; 



V. 90, 235. 



— as a control in cheese defect, II. 357; 

 IV. 288; V. 235. 



— bacteria, aromatic substances, II. 

 357; III. 173. 



— bacteria, slime production, II. 357; 



IV. 38, 286, 318. 

 Wijnstok: see Vine and Grape. 



W ij s m a n, starch plate method for the 

 demonstration of maltase and dex- 

 trinase, III. 129-130-131, 134-136; V. 

 22. 



Willow (Saule, Weide, Wilg), I. 29, 31, 66, 

 92. 94. 149; II. 123. 124. 126; III. 230; 



V. 79, 256. 



Willow rosé (gall caused by Cecidomyia), 

 I. 5, 22, 29. 46. 52; II. 128, 131; V. 

 256. 



Wine defects, III. 274; V. 109. 



Winogradsky's theory of chemo- 

 synthetic carbon dioxide assimilation 



in nitrification, III. 238; IV. 180,205, 



206, 379; V. 191. 

 Witchbroom, I. 14, 28, 32, 58, 75. 

 Woad, (Pastel), III. 329-336, 337, 341. 



342, 343; IV. 1-13. 59. 101. 

 Wood, humification, IV. 255. 

 W^ood anemone (Boschanemoon), I. 13. 

 Wood snail, I. 319. 

 Woolly aphis, I. 34, 35. 



Xanthoria {Physcia) parietina: gonidia 

 identical with Cystococcus humicola, V, 

 288. 



— occurrence, III. 23. 



Xenogenesis, V. 80. 



Xylose, dissimilation by microorganisms, 

 V. 94. 



Yeast : see also : Saccharomyces and Schi- 

 zosaccharomyces. 



— acetic ester production, III. 173, 183- 

 185. 



— acid production, III. 184. 



— agglutination by lactic acid bacteria, 

 II. 216; IV. 313, 316-321. 



— alcohol yield, III. 61. 



— arrack. III. 54, 257. 265. 



— aromatic substances. production, III. 

 173, 183, 259; IV. 232. 



— autoagglutination, IV. 313-316, 322. 



— autofermentation, V. 161-167, 222- 

 225. 



— autofermentation and presence of 

 glycogen. V. 161. 162. 239. 



— bakers, III. 280, 282, 286, 287; IV. 

 54. 57-60, 203-205, 314; V. 223; 

 VI. 35, see also: Yeast, dried. 



— bakers, and Srewery, comparison of 

 the maceration juices, V. 223, 224. 



— bottom. III. 58; IV. 313, 322, 323; 

 V. 164, 222-224. 



— bottom, assimilation of melibiose, IV. 

 323. 



— brewery, II. 190, 212, 213. 221, 222, 

 279, 280; III. 61, 266. 279. 343. 346; 

 IV. 24. 203. 204. 314. 319; V. 71. 161, 

 223, 234, 242; VI. 78. 



— brewery, and pressed, differentiation 

 between, III. 61; V. 163. 



— Buchners juice, V. 220-222. 



