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 



1 1. Potato jar 46 



12. Cylinder of potato cut obliquely 47 



1 3. Ehrlich's tube containing piece of potato 47 



.14. Apparatus for filling tubes 50 



J5. Tubes of media 50 



16. Platinum wires in glass handles 51 



jy. Method of inoculating solid tubes . 52 



18. Rack for platinum needles 53 



19. Petri's capsule 53 



-20. 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 61 



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 . . . -71 



37. Apparatus for counting colonies 72 



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



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

 -^o. Chamberland's bougie, with lamp funnel . . . ' . . . -76 

 41. Bougie inserted through rubber stopper .... . . 76 



' xvii 



