CONTENTS. 



Xlll 



Section II. General Biology and Classification of Bacteria. 



CHAPTER VII. THE BACTERIA UNDER THE INFLUENCE OF 

 PHYSICAL AGENCIES. 



PAGE 



60. Influence of Electricity . 73 

 61. Influence of Temperature 

 Cold- and Heat-loving 

 Bacteria. ... 75 



PAGE 



62. Influence of Light Self- 

 Purification of Rivers . 77 



63. Influence of Mechanical 

 Shock, Gravity and Gas- 

 eous Pressure . . . 8 1 



CHAPTER VIII. BACTERIA IN THEIR KELATION TO ONE ANOTHER. 



64. Symbiosis, Metabiosis, An- 

 tagonism 



65. Mixed Cultures 



86 



CHAPTER IX. CLASSIFICATIOM OF THE BACTERIA. 



66. First Attempt by O. F. 



Miiller .... 

 67. Conn's Classification . 

 68. Billroth's Coccobacteria 



Septica .... 



j 69. De Bary and Hueppe's 



88 I Classification . . .91 



89 70. Pathogenic, Chromogenic, 



and Zymogenic Bacteria 93 

 89 



Section III. Principles of Sterilisation and Pure Cultivation. 



CHAPTER X. METHODS OF STERILISATION. 



71. Sterilising . . . -95 

 72. Freeing the Air from 



Germs .... 96 

 73. Filtration of Drinking 



Water .... 98 

 74. The Bacterium Filter in 

 the Service of Enzy- 

 mology .... 99 

 75. Beer Filters . . . 100 

 76. Destroying Germs by Dry 



Heat .... 101 

 77. Destroying Germs by Moist 



Heat .... 103 

 78. Intermittent Sterilisation . 105 

 79. Mineral Antiseptics: Cor- 

 rosive sublimate, sul- 



phurous acid, carbon 

 dioxide, chlorine and 

 chloride of lime, ozone 

 and hydrogen peroxide, 

 milk of lime . . .107 



80. Organic Antiseptics: Phe- 

 nol, cresol, creolin, lysol, 

 sapocarbol, solveol, solu- 

 tol, saprol, salicylic acid, 

 antinonnin, ethyl alco- 

 hol, ethyl ether, form- 

 aldehyde, iodoform, 

 chloroform, benzoic acid 112 



8 1. The Combined Method of 



Sterilisation . . .117 



CHAPTER XI. METHODS OF PURE CULTURE. 



82. Nutrient Solutions . . 121 

 83. The Dilution Method and 



Fractional Cultivation . 124 



84. Liquefiable Solid Media . 128 



85. Koch's Plate Cultures- 

 Streak and Puncture Cul- 

 tures Preserving Cul- 

 tures Auxanography . 



