LIST OF ILLUSTRATIONS. 



FIG. PAGE. 



1 . Form Types of Bacteria 12 



2. Position in which Inoculating Needle is Held while Cooling, 20 



3. Proper Position of Holding Knife after Flaming, 20 



4. Sectional View of Hot-air Oven, 22 



5. Koch $team Sterilizer. (From ), 26 



6. Diagram of Arnold Steam Sterilizer. (From ), 28 



7. Sectional View of Autoclave, 30 



8. Glass Bulb to Illustrate Value of Cotton Stoppers as Protection from Air 



Contamination, 36 



9. Kitasato Filter. (From - ) 38 



10. Filter Reversed in a Percolator Filled with Water in Order to Wash Back 



Solid Particles Lodged in its Wall, ,38 



11. Test-tube Brush, 58 



12. Wire Basket for Test-tubes. (From Williams) 60 



13. Roux's Potato Tube, 60 



14. Fermentation Tube, 60 



15. Fermentation Tube, 60 



16. Types of Culture Flasks, 62 



1 7. Types of Distribution Flasks, 62 



18. Culture Dish. (From - ), -. 64 



19. Petri Dish. (From - ), 64 



20. Metal Box for Holding Glass Plates During Sterilization in Oven, 66 



21. Set of Culture Plates and Platforms, 66 



22. Section of Potato Intended for Dish Culture, 74 



23. Culture Tube Containing Cylinder of Potato Resting on Small Glass Rod, .... 76 



24. Distribution of Liquid Medium from Covered Funnel to Culture Tube, .... 86 



25. Siphonage of Serum, ! 86 



26. Distribution to Culture Tube of Liquid Medium from Flask A, by Pressure 



from Siphon Flask B, -. 88 



27. Hot-water Filtration Bucket, 92 



28. Series of Tubes Arranged for Collection and Sedimentation of Blood-serum, 96 



29. Blood Tube with Siphon Arranged to Transfer Serum from Jar to Sedimenta- 



tion Tubes; Tube a to be Kept above Level of Serum in Last Tube, 98 



30. Distribution from Sedimentation Tube to Culture Tubes; Tubule a Raised 



above Red Sediment in Sedimentation Tube, 100 



31 . Blood-serum Inspissator, Koch Pattern, 102 



32. Straight Platinum Wire and Platinum Wire Loop. (From ),. . . . 108 



33. Proper Mode of Holding Tubes of Solid Medium in Inoculation, 110 



34. A. Stroke Culture. B. Puncture Culture, '. 112 



35. Sterile Cotton Swab in Tube, with Rubber Cap over Mouth of Latter for 



Greater Protection of Swab and to Prevent Drying, 112 



ix 



