LIST OF ILLUSTRATIONS. 



1. Forms of bacteria . . . . .17 



2. Hot-air steriliser . . . . . .36 



3. Koch's steam steriliser . . . .38. 



4. Autoclave . . . . . -39 



5. Steriliser for blood serum . . . . .40 



6. Meat press .... .42 



7. Hot- water funnel .... .47 



8. Blood-serum inspissator . . . . 5 1 



9. Potato jar ...... 54 



10. Cylinder of potato cut obliquely . . . .54 



11. Ehrlich's tube containing piece of potato . . .54 



12. Apparatus for filling tubes . -57 



13. Tubes of media . . . . . -57 



14. Platinum wires in glass handles . . . .58 



15. Method of inoculating solid tubes . . . -59 



1 6. Rack for platinum needles . . . .60 



17. Petri's capsule . . . . . .62 



1 8. Koch's levelling apparatus for use in preparing plates . 64 



19. Koch's levelling apparatus, showing transference of plate . 65 



20. Tube for Esmarch's roll culture . . . .65 



21. Apparatus for supplying hydrogen for anaerobic cultures . 69 



22. Esmarch's roll-tube adapted for culture of anaerobes . 70 



23. Flask for anaerobes in liquid media . . .72 



24. Flask arranged for culture of ancerobes which develop gas . 73 



25. Tubes for anaerobic cultures on the surface of solid media . 74 



26. Slide for hanging-drop cultures . . . -75 



27. Graham Brown's chamber for anaerobic hanging-drops . 76 



28. Apparatus for counting colonies . . . -77 



29. Geissler's vacuum pump for filtering cultures . .81 



30. Chamberland's bougie with flask arranged for filtration . 81 



31. Chamberland's bougie, with lamp funnel . . .82 



