346 



INDEX. 



NASAL cavity, bacteria of, 152, 

 361 



Natural immunity, 176 

 Necrosis bacillus, 231 

 Neisser's gonococcus, 258, 183 



stain for diphtheria bacilli, 278, 



279 

 Neutral red in culture-media, 77, 



303, 310, 313, 3i4 

 Neutralization of culture-media, 71, 



72, 73 



Nitrate of silver, 200 

 Nitrifying bacteria, 130, 133 

 Nitrogen fixation by bacteria, 134 



liberation by bacteria, 130 

 Nitroso-indol reaction, 130 

 Noma, 230 

 Non-pathogenic bacteria, definition, 



120 



bacteria, 221 

 Normal solutions, 73 

 Nose-piece, 29 



Novy's method for anaerobes, 94 

 Nucleins, 191 



Number of bacteria in feces, 155 

 milk, 147, 148 

 soil, 133 

 water, 140 



species of bacteria, 221 

 Nutrient agar-agar, 76 

 bouillon, 71 

 gelatin, 74 

 Nut.ition of bacteria, 125 



OBERMEIER'S spirillum, 326 

 Objectives, 29 

 Ocular, 29 

 Odors developed by bacteria, 130 



from water, 137 

 Oese, 33 



Oidium lactis, 233 

 Oil, aniline, 41, 53 



cedar-wood, 31 



culture-media containing, 81, 

 265 



-immersion objective, 30, 31 

 Oil, kerosene, 207 

 Oils, essential, as germicides, 207 

 Osteomyelitis, 240, 245, 308 

 Otomycosis, 234 



Ovum, bacteria conveyed in, 161 

 Oxalic acid, _M j 

 Oxygen, relation of bacteria to, 126 



Oysters, typhoid fever conveyed by, 



150 



Ozaena, bacillus, 261 

 Ozone in purifying water, 139 



PARACOLON bacillus, 312 

 Paraffin imbedding, 49 

 Faraform or paraformaldehyde, 202 

 Parasite, definition, 120 

 Paratyphoid bacillus, 312 

 Park, Roswell, method for disinfect- 

 ing hands, 212 

 Park, W. H., method for cultivating 



anaerobes, 94 

 Parietti's method for examination of 



water, 143 



Passive immunity, 181 

 Pasteur, 23, 26 



Pasteur-Chamberland filter, 69, 1 39 

 Pasteurization, 67, 146 

 Pathogenic bacteria, definition, IJT 

 descriptions of species, 235 

 Pear-blight, 16, 158 

 Penicillium glaucum, 233 

 Peptone, 71, 129 



solution concentrated, 323 

 Dunham, 79 

 Peptonizing ferments formed by 



bacteria, 128 



Pericarditis, 241. 245. 247, 254 

 Peritonitis, 241. 245, 247, 263, 265, 



312 



I'crlsucht, 290 



Permanganate of potassium, 207, 212 

 Peroxide of hydrogen, 206 

 Petri dishes, 98 

 Petroleum for destroying insects, 



207 

 Pfeiffer's capsule bacillus, 261 



reaction for cholera spirillum 

 (Pfeiffer's phenomenon), 189, 

 319 



Phagocytosis, 182, 188, 235. 334 

 t'henol (see also Carbolic acid), 129 

 Phenolthalein, 72 

 Phosphorescence of bacteria, 128, 



225 



Picric acid, 39 



Piorkowski's culture-medium, 304 

 Piroplasma, 165 

 Placenta, bacteria transmitted 



through, 161 

 Plague, bubonic, bacillus of, 265 



