.'82 



BACTERIA IN RELATION TO PLANT DISEASES. 



Page. 



Quantitative determination, 



of bacteria in diseased tissues 14 



of effect of freezing 79 



Quince blight, due to B. amylovorus 202 



Rabies-virus, removed by filtration 214 



Rabinowitsch, thermophilic bacteria 248 



Radium rays 2 45 



Raulin's culture-fluid 197 



Ravenel, bacteria exposed to liquid air 246 



Razors, 



sharpening of I21 



Torrey, Rogers, Lentz 123 



Reaction, 



for maximum growth in liquid media. .. 69,203 

 of host to parasite 8 



Record-books, 



for culture-media IO 9 



for field-notes "O 



Records, methods of keeping 109 



Reducing negatives '42 



Reducing powers of bacteria 62 



Reichenbach, branching in Spirillum 217 



Reichert, thermo-regulator, improved 78 



Reimers, bacteria in soil 255 



Rein, Florideae, source of agar 224 



Reinitzer, on gum-ferment 233 



Re-isolations, necessity for 1 6 



Relationships of bacteria 177 



Rennet 67 



Rhabdochromatium 164 



Ribbert, method of staining capsules 194 



Rice for culture-media 48 



Ridgway, color scheme of 263 



Roentgen rays 245 



Rogers, pathogenicity developed by association. 215 



Rohrbeck thermostat 75 



Roll-cultures, Esmarch's 226 



Root-tubercle bacteria 64, 240, 241 



Roth, contact-irritation 253 



Rothberger, 



differential diagnosis with anilin dyes 230 



toluidin red for differentiation 230 



Rothert, effect of ether and chloroform 254 



Roux filter, for culture-fluids, etc 44 



Roux thermo-regulator 78 



Rubber, 



caps for tubes of media 99 



note on best solvents for 207 



Rulers for measuring colonies, glass, steel. ... 115 



Rules of proof 9, 10 



Russell & Babcock, fermentation of silage. . . . 257 



Ruzicka, inner structure of bacteria 217 



Saccardo, color scheme of 263 



Sachs, reduction of cane-sugar in plants 66 



Safranin-picro-nigrosin 189 



Salicylic acid 74 



Salt-bouillon 51 



Salt-water bacteria, minimum temperature 



for 87, 255 



Sander, growth of tubercle bacteria on vege- 

 table media 222 



Sand-fleas, bacterium of luminous 60, 242 



Page. 



Saponification of casein in milk-cultures 46 



Saprophytes, 



behavior of, when injected into plants 89 



presence in diseased parts long affected .... 13 



Sarcina 160 



Sauerkraut, fermentation of 257, 258 



Scales for photographic exposures 143 



Schaffner's safranin-picro-nigrosin 189 



Schaudinn, 



bacillus of large size 19 



two endospores in a cell 22 



Scheffler, neutral red for differentiating 230 



Schild, formalin for detection of B. typhosus. . 229 

 Schill, preparation of cultures for museums. . 262 

 Schilow, germicidal value of hydrogen pe- 

 roxide 251 



Schneider, studies on pigment- formation 237 



Schottelius, 



B. prodigiosus, non-pigmented races of 222 



preparation of nutrient agar 223 



Schliiter, effect of acids on bacteria 249 



Schultz, structural changes due to antiseptics. 252 



Schumburg, bromine, water treated with 252 



Schu'tz, method of making nutrient agar 34 



Schwartz, on antiseptics 250 



Sclavo's flagella-stain 192 



Sclerothrix 172 



Sea-weeds furnishing agar 33 



Sections, microtome, 



balsam for mounting 117 



boxes for preservation of 117 



cutting and care of 119 



for photographing 140 



keeping of material for 117 



mounting of 119 



preparation of 1 18 



staining of 119 



Sedgwick & Winslow, influence of cold on 



B. typhosus 247 



Setchell, thermophilic bacteria 248 



Signs of disease 7 



Silage-fermentation, 



bacteria active in 256 



bacteria not active in 257 



Silicate-jelly, 



for differential purposes 39 



method of preparing 37, 206 



value, as a culture-medium 36 



Winogradsky^Sleskin 198 



Sjoebring, nucleus in bacteria 216 



Skschivan, branched forms 217 



Slater, branched forms 237 



Slide-boxes 117 



Slides, 



care of discarded 107 



numbering of T2I 



Smith & Swingle, effect of freezing on bac- 

 teria 83 



Smith, Theobald, 



discovers cause of Texas fever 153 



method of filtering 226 



tubercle bacteria difficult to destroy by heat. 247 

 Soaps, germicidal action of certain 253 



