LIST OF ILLUSTRATIONS. 



FIG. PAGE 



1. Forms of bacteria . . . . . .13 



2. Hot-air steriliser . . . . . . .27 



3. Koch's steam steriliser . .... 27 



4. Autoclave x . . . . .29 



5. Steriliser for blood serum . . . . .30 



6. Meat press . . ... . . 31 



7. Hot-water funnel . . - . . .35 



8. Blood serum inspissator . . . . . 40 



9. Potato jar . ..... . .45 



10. Cylinder of potato cut obliquely .. . . .45 



11. Ehrlich's tube containing piece of potato . . - . 45 



12. Apparatus for filling tubes . . . 48 



13. Tubes of media ...... 48 



14. Platinum wires in glass handles . . .49 



15. Method of inoculating solid tubes . . . .50 



16. Rack for platinum needles ..... 50 



17. Petri's capsule ....... 51 



18. Koch's levelling apparatus for use in preparing plates . 54 



19. Koch's levelling apparatus ..... 54 



20. Esmarch's tube for roll culture . . . .55 



21. Apparatus for supplying hydrogen for anaerobic cultures . 58 



22. Esmarch's roll-tube adapted for culture containing anaerobes 59 



23. Bulloch's apparatus for anaerobic plate cultures . ._ 59 



24. Flask for anaerobes in liquid media . . . . 61 



25. Flask arranged for culture of anaerobes which develop gas . 62 



26. .Tubes for anaerobic cultures on the surface of solid media . 62 



27. Slides for hanging-drop cultures . . . .63 



28. Graham Brown's chamber for anaerobic hanging-drops . 64 



29. Apparatus for counting colonies . . . .65 



30. Wright's 250 c.mm. pipette fitted with nipple . 66 



31. Geissler's vacuum pump for filtering cultures . . .70 



32. Chamberland's candle and flask arranged for filtration . 70 



xvii 



