LIST OF ILLUSTRATIONS. 



WOOD ENGRAVINGS AND PHOTOGRAPHS. 



FIG. PAGE 



1. Ascococcus Billrothii, x 65 (Cobn) . . . . .14 



2. Spirochgeta from Sewage Water, x 1200 (E.M.C.) . . 15 

 '6. Flagella (Koch, Brefeld, Warming, Zopf) . .16 



4. Bacillus Megatherium (De Bary) . . . . . .17 



5. Clostridium Butyricum, x 1020 (Prazmowski) . . . .18 



6. Leuconostoc Meseuteroides ; Cocci-chains with Arthrospores (Van 



Tieghem and Cienkowski) . . . . . .19 



7. Spore-bearing Threads of Bacillus Anthracis, double-stained with 



Fucbsine and Metbylene Blue, x 1200 (E.M.C.) . . .20 



8. Bacilli of Tubercle in Sputum, x 2500 (E.M.C.) . 21 



9. Comma Bacilli in Sewage Water, stained with Gentian Violet, x 1200 



(E.M.C.) ........ 22 



10. Vibrios in Water contaminated with Sewage, x 1200 (E.M.C.) . 22 



11. Refraction of Light (Carpenter) .... .66 



12. Spherical Aberration (Carpenter) . . . . .67 



13. Combination of Lenses in Abbe's Homogeneous Immersion (Car- 



penter) ......... 67 



14. Chromatic Aberration (Carpenter) . . . . .68 



15. Objective with Collar Correction (Zeiss) . .69 



16. Microscope English Model (Swift) . 71 



17. Removable Mechanical Stage (Swift) . . . . .72 



18. Microscope Continental Model (Zeiss) . . . . .78 



19. Iris Diaphragm (Zeiss) ... 74 

 20. . Abbe's Condenser (Zeiss) ....... 75 



21. Microscope Lamp (Baker) . . , . . .6 



22. Large Microscope Lamp (Swift) . , . . . .77 



23. Arrangement of Powell and Lealand's Microscope in working directly 



on the Edge of the Flame, with Stand for Micrometer Eye-piece to 

 secure Steadiness and Accuracy of Measurement (Carpenter after 

 Nelson) . . . . . , . . .79 



24. Ramsden Micrometer Eye-piece (Swift) . 80 

 _."). Micrometer Eye-piece (Zeiss) . . . . . .81 



26. Inoculating Needles (E.M.C.) . . 84 



27. 1 eezing Microtome (Swift) . .94 

 L's. Microtome (Jung) . . .95 



29. Wire-cage for Test-tubes (Muencke) ..... 100 



30. Hot-air Steriliser (E.M.C.) . 101 



