LIST OF ILLUSTRATIONS, 



WOOD E^'WEAVINGS AND PHOTOGRAPHS. 



fl<5- PAGE 



1. Ascococcus Billrothii, ^ 65 (Cohn) . 14 



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

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

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



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



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



Tieghem and Cienkowski) .... 19 



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



Fuohsine and Methylene 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. Kefraction of Light (Carpenter) . . 66 



12. Spherical Aberration (Carpenter) . . 67 



13. Combination of Lenses in Abba's Homogeneous Immersion (Clar- 



1 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) . 73 



19. Iris Diaphragm (Zeiss) . 74 



20. Abba's Condenser (Zeiss) . 75 



21. Microscope Lamp (Baker) . 6 



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



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



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

 secure Steadiness and Accuracy of Measurement (Carpenter after 



Nelson) . . ' . . . 79 



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



25. Micrometer Eye-piece (Zeiss) . . 81 



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



27. Freezing Microtome (Swift) . 94 



28. Microtome (Jung) ... . , 95 



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



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



