203 



Yeast 



Wasp (Guepe, 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 W T ater flea. 



W^axy 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 9 

 X Triticum dicoccum <j, 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 rose (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. 

 Wood anemone (Boschanemoon), I. 13. 

 Wood snail, I. 319. 

 Woolly aphis, I. 34, 35. 



X 



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 brewery, 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. 



