INDEX. 



28 5 



Page. 



U-tubes, for testing growth in nitrogen 58 



Vacuo, 



concentration of fluids in 68 



growth in 54 



Vallin, cleaning filters 227 



Van Ermengem, 



flagella-stain rgi 



germicidal effect of ozone 251 



van't Hoff, modification of plate-method 228 



van Tieghem, thermophilic bacteria 247 



Varietal resistance to disease 93, 186 



Vascular system occupied by bacteria 8 



Velox-prints 151 



Ventilation, of dark-room 149 



Vernhout, bacterial fermentation of tobacco. . 257 



Vibrio, use of, as a genus name 173 



Vibrio cholerae, 



action of copper on 74, 250 



classification 172 



Vibrio, Muller's genus 172 



Viscidity 42 



of bacterial growths 19 



of milk 46 



of Uschinsky's solution 20 



Vitality on various media 72 



Voges, 



blue water-bacteria 237 



cultivates Cholera vibrio on potato 249 



Voigtlaender, physical properties of agar 224 



von Esmarch, roll-cultures of 226 



von Freudenreich, filtration of agar 224 



von Rozsahegyi, pigmented-media for differ- 

 entiation 229 



V-shaped forms 23, 217 



Wager exposure scale 143 



Waldo & Walsh, bread not fully sterilized by 



baking 261 



Wall-charts 206 



Wall of cell, outer, reaction to stains 28 



Walliczek, 



effect of dry air on bacteria 249 



effect of tannin on bacteria 251 



Ward, A. R., ropy milk 259, 260 



Ward, H. M., bacteria from Thames water.. . 258 



Warming 20 



Water, 



apparatus for distilling 124 



bacteria in, literature on 258 



Water-bacteria, 



blue and violet 237 



Hesse & Niedner's nutrient agar for 196 



Page. 

 Water-bacteria continued. 



how best kept 263 



media for 258 



Water, examination of. English methods for. 220 



Water-bath, Ostwald-Pfeffer 78 



Water-pores, infection through 92, 102, 124 



Wax-mixture, Darwin's 200 



Wehmer, fermentation of sauerkraut 2=;8 



Weigert, early use of anilin stains 29 



Weiss, 



bacteria from soured foods 235 



ruled counting-plate 36 



Welch, 



capsule-stain 20, 194 



influence of 152 



Welcke, flagella-stain 220 



Wescner, eggs as a culture-medium 225 



Weyl, ozone as a germicide 252 



Wilhelmy, bacteria in meat-extracts 260 



Williams, flagella-stain 193 



Winogradsky, 



agar for isolation of nitrate bacteria 199 



elective cultures 106 



medium for nitrogen-assimilating bacteria. 199 



nitrifying bacteria 240 



retting of flax 257 



silicate-jelly 36.-24O 



red sulphur-bacteria 263 



Winogradsky & Omelianski, fluid-media for 



isolating nitrate and nitrite bacteria. . . 199 



Winogradsky-Sleskin silicate-jelly 108 



Winslow & Rogers, Coccaceae revised by 265 



Wood-vinegar, an energetic disinfectant 252 



Wounds, 



disinfection of 107 



natural infection through 92 



Wright, anaerobes, simple methods of culti- 

 vating 228 



Wynne exposure meter 143 



Yendo, source of commercial agar 225 



Yersen, pest carried by rats 215 



Yokote, filtration of agar 225 



Y-shaped forms 23 



Zeiss lenses for photographic work, 



Double-Protar 130 



Planar 132 



Unar 130 



Zeiss microscopes 129, 130 



Zettnow, 



cleaning cover-glasses 227 



flagella-stain 192 



light-filter 137, 201 



