Index 



437 



Shaking 



effect of on bacteria, 172-173 



technic for sampling, 143 

 Shape of bacteria, 89 

 Shiga, 344 



Shigella dysenteriae, 344, 351 

 Sihcosis, 307 

 Silver 



nitrate, 202 



salts as disinfectants, 202 

 Simond, 349 



Single cell isolation technic, 124 

 Sintered glass filters, see filtration 

 Sinusitis, 333 

 Size of bacteria, 88-89 

 Skin as a protective barrier, 302 

 Slant cultures 



descriptive chart for, 127 



purposes of, 129 

 Slime laver, see capsules 

 Smallpox, 404-405 

 Smith, T., 349 

 Sneeze, 258, 317 

 Soaps, medicated, 212, 213 

 Social Security, 5 

 Society of American Bacteriologists 



constitution, 55 



journal published bv, 12 



membership in, 55 



photographs courtesy of, 189, 258, 

 317 

 Soil, 265-276 



carbon cycle, 273-275 



composition, 265-268 



fertility of, 363 



nitrogen cycle, 270-273 

 Solid media, '46-48 

 Soluble specific substance, 329 

 Solutions, 166 



Somatic antibodies and antigens, 313 

 Sorbonne, 32 

 Sorensen, S. P. L., 65 

 Spallanzani, L., 25, 26, 28 

 Special media, 82 

 Spectacles, development of, 7 

 Spheres, bacterial, 90 

 Spirals, 92, 345-347 

 Spirillum, 54 

 Spirochaetales, 53, 54, 56 

 Spoilage by molds, 364 

 Spontaneous combustion, 175 



Spontaneous generation, theories of, 



21-32 

 Sporangiophore, 360, 361 

 Sporangiospore, 360, 361 

 Sporangium, 360, 361 

 Spores 



anthrax, 44 



in bacteria, 101-103 



location of, 102 



resistance of, 69 



staining of, 114, 128 

 Spreading factor, 186, 331 

 Springs as water supplies, 223 

 Sprue, 376 

 Stagnant water, 14 

 Stahl, G., 33 

 Staining 



acid-fast, 112 



capsule. 111, 112 



flagella, 115 



gram, 109-111 



granule, 114 



negative, 108 



of microbes, 106-115 



spores, 114, 128 

 Stains 



differential, 108 



general, 107 

 Standard nutrient agar, 82, 234 

 Stanley, W., 395 

 Staphylococcus, see Micrococcus 

 Steam pressure, see autoclave 

 Steinhaus, E. A., 348 

 Sterility 



as a prerequisite for a good medium, 

 60 



definition of, 70 

 Sterilization 



Arnold, 71 



chemical, 79 



definition of, 197 



dry method of, 74-76 



filtration as a method of, 75-79 



moist method of, 70-75 



physical, 69 

 Stevenson, R. L., 66 

 Stock culture collection, 155 

 Stomach as protecti\'e barrier, 302 

 Streak plates, 121-123, 128-129 

 Streptococcus 



characteristics of, 330-332 



hemolytic, 290, 330-331 



