LIST OF ILLUSTRATIONS. 



FIG. PAGE 



1. Forms of bacteria 13 



2. Hot-air steriliser 29 



3. Koch's steam-steriliser 30 



4. Arnold steam-steriliser 30 



5. Autoclave 31 



6. Steriliser for blood serum 32 



7. Meat press 34 



8. Wire funnel for supporting paper filter 39 



9. Hot-water funnel 40 



10. Blood serum inspissator 44 



11. Potato jar 46 



12. Cylinder of potato cut obliquely 47 



13. Ehrlich's tube containing piece of potato 47 



14. Apparatus for filling tubes 50 



15. Tubes of media 50 



1 6. Platinum wires in glass handles 51 



17. Method of inoculating solid tubes 52 



1 8. Rack for platinum needles , . . -53 



19. Petri's capsule 53 



:2O. Koch's levelling apparatus for use in preparing plates .... 55 



21. Koch's levelling apparatus, showing transference of plate .... 56 



22. Esmarch's tube for roll-culture 56 



23. Apparatus for supplying hydrogen for anaerobic cultures .... 59 



24. Esmarch's roll-tube adapted for culture containing anaerobes ... 60 



25. Novy's anaerobic jar ........... 6l 



26. Bulloch's apparatus for anaerobic plate-cultures . . . . . .61 



27. Flask for anaerobes in liquid media ........ 63 



28. Flask arranged for culture of anaerobes which develop gas . . .64 



29. Wright's method for cultivation of anaerobes in solid media ... 65 

 30,31. Wright's method for cultivation of anaerobes in fluid media . . . 65 



32. Tubes for anaerobic cultures on the surface of solid media ... 66 



33. Harris' method of making collodion sacs . . . . . . -67 



34. Slide for hanging-drop cultures 68 



35. Graham Brown's chamber for anaerobic hanging-drops .... 69 



36. Sternberg's bulb adapted for thermal death-point test . . . 7 1 



37. Apparatus for counting colonies ......... 7 2 



38. Geissler's vacuum-pump for filtering cultures ...... 75 



39. Chamberland's candle and flask arranged for filtration .... 76 



40. Chamberland's bougie, with lamp funnel ....... 7^ 



41. Bougie inserted through rubber stopper 76 



xvii 



