INDEX 



529 



Bh6ne, river, bacteria in, 91, 92 



Rivers, bacterial contents of, 89- 

 102 



Rockner-Eothe's process for puri- 

 fying water, 192 



Rosettaceus, M., 503 



' Hotlier ' Bacillus^ 441 



Roux's method of cultivating bac- 

 teria on potatoes, 22 



Muhefaciens, B,, 441 



Ruber, B. (IBacille rouge de Kiel), 

 442 



action of light on, 352, 353 



Ruhescens, B., 438 



Rubins, B.J 440 



Rubrum, Spirillurth^ 406 



Rufuin, SpirilVwm, 409 



Rugula^ Sxnrillum, 407 



Sand filtration, 117-154 



experimental, 154-159, 169, 



170 



— bacterial effect of thickness of, 

 126, 144 



— ■ bacteria in, taken from Berlin 

 filter-bed at different depths, 

 158 



— bacteria in, taken from different 

 depths of experimental filtering 

 tank, 166 



— silver, filtration by means of, 

 169, 170 



— green, filtration by means of, 

 169, 170 



— white, agitation of water with, 

 200 



Sa6ne, river, bacteria in, 91, 92 

 Sa^rogenes II.j B., 432 

 Scuprophiles a. Vibrio, 404 



— y, Vibrio, 404 

 Sea-water, bacteria in, 112 



— descriptions of bacilli obtained 

 from, 451-457 



Sedimentation, effect of, on bac- 

 teria in water, 95-98, 112, 184- 

 193 

 ' Seidenglci/nzender Bacillus ' (Tata- 



roff),489 

 Seine, river, bacteria in, 91, 220 



— multiplication of, 226 



Seltzer -water, vitahty of bacteria 



in, 236-242 

 Septicaemia, symptoms of, induced 

 by impure water, 257, 258 



Septicemia, bacillus of rabbit, dis- 

 covery of, in water, 258 



.mouse, discovery of, in 



water, 258 



Serpens, Spirillum, 409 



Sewage, purification of by Rockner- 

 Rothe's process, 192 



experiments on, in Massachu- 

 setts, 159-167, 205-216 



— purification of, by sand filtration, 

 159-167 



■ irrigation, 167-169 



— strength of, in America, 161 



— bacterial contents of, 89, 101, 

 163, 168, 205-209 



SiHca jelly, 17 



Slime and retention of bacteria in 



sand filters, 155-159 

 Snow, bacterial contents of, 84, 85 

 Soda crystals, addition to gelatine 



peptone of, 67 

 Sodium carbonate added to gelatine 



peptone, 63-67 



— chloride, insolation of anthrax 

 in presence of, 383 



— sulphate, insolation of anthrax 

 in presence of, 383 



Softening of water by Clark's pro- 

 cess, 185 



— — Gaillet and Huet's pro- 

 cess, 191 



Southwark and Vauxhall Com- 

 pany's filter-beds, bacterial ex- 

 amination of, 135, 136 



Spectrum, action of different rays 

 of, on bacteria, 334, 339, 353, 354, 

 356-360 



Spirillar forms, detection in water 

 of, 276, 279, 280, 283 



— — found in water, 399-409 

 behaviour of, in presence of 



albuminoids, 280 

 Spirillv/m cholerae asiaticae (see 



Cholera bacillus) 

 Spores, staining of, 52-54 



— resistance of, to high tempera- 

 tures, 2 



Spree, river, bacteria in, 92-95, 143 

 Springs, mineral, bacteria in, 108, 

 . 109 

 Spring-water, bacteria in, 107, 108 



multiplication of, 224 



Staining of micro-organisms, 42-59 



nuclei of tissue, 49 



flagella, 54-58 



M M 



