LIST OF ILLUSTRATIONS. 



WOOD ENGRAVINGS AND PHOTOGRAPHS. 



FIG. PAGE 



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



_'. Spirochseta from Sewage Water, x 1200 (E.M.C.) . . 15 



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



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



.">. riostridium Butyricum, x 1020 (Prazmowski) . . . .18 



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



Tieghem and Cienkowski) . . . . . .19 



7. >\ (ore-bearing Threads of Bacillus Anthracis, double-stained with 



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



>. I'.acilli of Tubercle in Sputum, x 2500 (E.M.C.) . . 21 



'.'. 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 

 1.",. Objective with Collar Correction (Zeiss) . . .69 

 !'.. Microscope English Model (Swift) . . 71 

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

 1*. Microscope Continental Model (Zeiss) . . . . 73 

 1!. Iris Diaphragm (Zeiss) . . .71 

 L'II. A t.be's Condenser (Zeiss) . . . . . . .75 



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



22. I. nine Microscope Lamp (Swift) . , . . . .77 



rangement 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 



2.">. Micrometer Eye-piece (Zeiss) . . . SI 



2;. Inoculating Needles (E.M.C.) . . 84 



27. Freezing Microtome (Swift) . . . . . .04 



2 s . Microtome (Jung) . . . . . . .95 



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



::<J. Hot-air Steriliser (E.M.C.) . . 101 



