| PAGE |
| Various Forms of Bacteria | 9 |
| Sarcina | 10 |
| Normal and Pleomorphic Forms of Tubercle | 13 |
| Bacilli, Showing Flagella | 15 |
| Various Forms of Spore Formation and Flagella | 18 |
| Potato in a Roux Tube Prepared for Cultivation | 22 |
| Staphylococcus Pyogenes Aureus Incubator | to face 22 |
| Culture Media Ready for Inoculation | 23 |
| Inoculating Needles | 24 |
| Pasteur's Large Incubator for Cultivation at Room Temperature | to face 24 |
| Method of Producing Hydrogen by Kipp's Apparatus for Cultivation of AnaËrobes | 27 |
| AnaËrobic Culture | 28 |
| Koch's Steam Steriliser | 31 |
| Levelling Apparatus for Koch's Plate | 40 |
| Moist Chamber in which Koch's Plates are Incubated | 41 |
| Hot-Air Steriliser | 42 |
| The Hanging Drop | 44 |
| Drying Stage for Fixing Films | 45 |
| Types of Liquefaction of Gelatine | 47 |
| WolfhÜgel's Counter | 49 |
| Petri's Dish | 50 |
| Berkefeld Filter | 52 |
| Apparatus for Filtering Water to Facilitate its Bacteriological Examination | to face 52 |
| Bacteria of Typhoid Fever | 56 |
| Bacillus Coli Communis | 60 |
| The Comma-Shaped Bacillus of Cholera | 66 |
| *Bacillus Typhosus | to face 66 |
| *Bacillus Typhosus | to"fac66 |
| v*Bacillus Coli Communis | 66 |
| *Bacillus Mycoides | 66 |
| Pasteur-Chamberland Filter | 80 |
| Proteus Vulgaris | 86 |
| Bacillus Enteriditis Sporogenes | 86 |
| A Plan of Septic Tank and Filter-Beds | 91 |
| Filter-Beds | 94 |
| Miquel's Flask | 97 |
| Sedgwick's Sugar-Tube | 99 |
| Sedgwick's Tube | 100 |
| Saccharomyces CerevisiÆ | 117 |
| Ascospore Formation | 120 |
| Gypsum Block | 121 |
| Yeast | toface122 |
| Ascospore Formation in Yeast | to"fac122 |
| Nitrogen-Fixing Bacteria from Rootlet Nodules | to"fac122 |
| *Bacillus of Tetanus | to"fac122 |
| Saccharomyces Ellipsoideus | 126 |
| Saccharomyces Pastorianus | 126 |
| Bacillus Acidi Lactici | 131 |
| Bacillus Butyricus | 133 |
| Kipp's Apparatus | 140 |
| FrÄnkel's Tube | 141 |
| Buchner's Tube | 141 |
| A Method of Growing Cultivations in a Vacuum over Pyrogallic Solution | 143 |
| Micrococcus from Soil | 151 |
| Nitrous Organism | to face 158 |
| Nitric Organism | to"face158 |
| Nitrogen-Fixing Organism from Secretion of Root-Nodules | to"face158 |
| Rootlet of Pea with Nodules | 163 |
| Nitrogen-Fixing Bacteria in Situ in Nodule on Rootlet of a Pea | to face 164 |
| Nitrogen-Fixing Bacteria in Situ in Rootlet-Nodule of a Pea | to"fac164 |
| Nitrogen-Fixing Bacteria in Situ in Root-Nodule of a Pea | to"fac164 |
| Bacillus of Tetanus | 170 |
| Bacillus of Symptomatic Anthrax | 172 |
| Bacillus of Malignant Œdema | 172 |
| A Centrifuge | 228 |
| Suspended Spinal Cord | 255 |
| Flask Used in the Preparation of the Toxin of Diphtheria | 262 |
| vi*Bacillus Tuberculosis | to face 280 |
| *Bacillus Tuberculosis | 280 |
| *Streptococcus Pyogenes | 280 |
| *Bacillus Anthracis | 280 |
| Flask Used in the Preparation of Tuberculin | 282 |
| Bacillus of Diphtheria | 289 |
| Types of Streptococcus | 298 |
| Micrococcus Tetragonus | 299 |
| Diplococcus of Neisser | 300 |
| Bacillus of Anthrax and Blood Corpuscles | 302 |
| Threads of Bacillus Anthracis, Showing Spores | 302 |
| Bacillus of Plague | 306 |
| *Bacillus of Plague | to face 310 |
| *Bacillus of Leprosy | to"fac310 |
| Streptothrix Actinomyces | to"fac310 |
| Bacillus Mallei | to"fac310 |
| Diplococcus of Pneumonia | 312 |
| Bacillus of Influenza | 315 |
