194 



INDEX 



of, 159, 160 ; relation of to host, 146 ; 



varieties and races of, 147. 

 Paul and Kronig, action of chemicals on 



bacteria, 173. 

 Pea, butyric fermentation of, 121 ; fixation 



of N by, 91. 

 Pectin compounds, action of retting bacteria 



on, 123. 

 Pediococcus, 33 ; P. tetragenus, 19, Fig. 10. 

 Pellicles, formation of, 3 ; character of, 4. 

 Penicillium, growth of on fruits, 99 ; P. 



glaucum, 3, Fig. 2 ; 36, Fig. 15 ; 



influence of on ripening of cheese, 119. 

 Pentamethylendiamine, 100. 

 Pepsin, action of on proteids, 1 10. 

 Peptone, chemotaxis of, 79 ; minimal 



amount for, 81 ; properties of, 99 ; as 



source of N and of C, 55 ; — bacteria, 



55- 

 Per£, on lactic fermentation, 176. 

 Perithecia, 42. 



Peritricha, 1 5 ; taxonomic importance of, 3 1. 

 Permeability of bacteria, 8, 9. 

 Peters, on fermentation of dough, 178. 

 Petruschky, on pathogenic Streptococci, 180. 

 Pettenkofer, on cholera, 182. 

 Pettenkofer and Emmerich, on cholera 



germs, 155. 

 Pfeffer, on chemotaxis, 79, 1 73 ; minimal 



amount of peptone for, 81 ; on Weber's 



Law, 173 ; on symbiosis of Lichens, 95. 

 Pfeiffer, cholera serum reaction of, 166; on 



diagnosis of cholera Vibrio, 184; on 



immunity, 155. 

 Pfeiffer and Proskauer, on cholera antitoxin, 



184. 

 Pfliiger, on phosphorescent bacteria, 172. 

 Phagocytes, ingestion of bacteria by, 161 ; 



chemotropism of, 162. 

 Phagocytosis, literature of, 182, 183. 

 Phenol, 99 ; action of on ferments, 109 ; on 



virulence of bacteria, 28. 

 Phenylacetic acid, 99. 

 Phenylamido-propionic acid in cheese, 1 1 9. 

 Phenylpropionic acid, 99. 

 Phisalix, on asporogenous anthrax, 170. 

 Phosphorescence, of bacteria, 63, 172 ; 



influence of oxygen on, 63 ; culture of, 



63.64. 

 Phosphuretted hydrogen, production of, 100. 

 Photobacterium, 30, 63. 

 Phototactic sensitiveness, 69. 

 Phthisis, occurrence of Streptococcus pyo- 

 genes in, 148. 

 Pigments, of bacteria, 1 2 seq. ; in milk, 1 1 8 ; 



distribution of, 12, 13 ; influence of 



medium on, 56 ; of oxygen on, 61 ; in 



yeasts, 128. 

 Pilobolus, influence of light on formation of 



sporangia of, 72. 

 Pinguicula, bacteria on leaf of, 138. 

 Planococcus, 33. 



Planosarcina, 33. 



Plasmodium malariae, 40. 



Plasmolysis, 6 ; of bacteria, 8, Fig. 6 ; 

 influence of on movement, 9. 



Plate culture, 58. 



Plectridiae, 33. 



Plectridium, 33 ; types of, 121 ; P.paludo- 

 sum, ill, Fig. 24 ; formation of spores 

 of, 20, Fig. 11. P. tetani, 150. 



Plectron, 32 ; of anthrax, 31. 



Pleogeny, 24, 29. 



Pleomorphism, 274; literature of, 170; in 

 haplo-bacteria, 25. 



Pleurococcus, 37. 



Pneumococcus, 149 ; fermentative activity 

 of, 114. 



Pneumonia, cause of, 149. 



Poikilothermism of bacteria, 73. 



Poisons, chemotaxis of, 79, 80 ; modification 

 of action of, 81, 82 ; lethal and inhi- 

 bitory percentages of, 82, 83. 



Polar granules, 9. 



Pollender, on anthrax in blood, 181. 



Polysaccharides, non-fermentability of by 

 yeast, 131. 



Polytoma uvella, 38. 



Polytrophic bacteria, 29. 



Polytrophism, 49. 



Popoff, on fermentation of dough, 178. 



Potash, caustic, lethal percentage of, 83, 84. 



Potassium salts, chemotaxis of, 79 ; — 

 nitrate as source of N, 55 ; - — perman- 

 ganate, lethal percentage of, 83, 84. 



Potato, bacterial diseases of, 138. 



Prazmowski, on development of bacteria, 

 170; on involution forms, 170; on 

 root-tubercle bacteria, 174. 



Predisposition, 167. 



Pressure, influence of on bacteria, 73, 173. 



Primitive organisms, theories of, 7. 



Propionic acid, production of by bacteria, 

 114. 



Propyl alcohol, production of by yeast, 132. 



Proskauer and Beck, on tubercle bacillus, 181. 



Proteids, percentage of in bacteria, 52 ; 

 decomposition of, 99, 100. 



Proteus, 30, 102 ; P. vulgaris, 101, 102, 

 Fig. 22. 



Protista, 35 ; place of in nature, 36. 



Prototrophic bacteria, 54. 



Prototrophism, 48, 49. 



Protozoa, importance of in putrefaction, 136. 



Pseudomonas, 32. 



Pseudopodia, 40. 



Psichohormium, iron in, 70. 



Psycho-physical law, So. 



Ptomaines, importance of, 1 59 ; literature 

 0I > '75 > production of, 100. 



Ptomatropine, 100. 



Puccinia, cultural varieties of, 93. 



Pulmonary phthisis, origin of, 152. 



Purple bacteria, 172. 



