XX LIST OF ILLUSTRATIONS. 



WOOD ENGRAVINGS. 



F IG. PAGE 



1. Koch's Steam-Steriliser . . . . 4 19 



2. Hot-air Steriliser . . . . . . .20 



3. Section of Hot-air Steriliser . . . . V . 20 



4. Hot- water Filtering Apparatus, with Ring Burner . ..". . 22 



5. Wire Cage for Test-tubes ...... 24 



6. Platinum Needles . . . . . . 25 



7. Damp-chamber for Plate-cultivations ... .26 



8. Apparatus employed for Plate-cultivations . . . . . ,. .26 



9. Box for Glass Plates . . . . . > -27 

 10 and ii. Glass Benches for Glass Plates or Slides . . -27 



12. Israel's Case ........ 28 



13. Damp-chamber, for Potato-cultivations . . . .28 



14. Serum Steriliser ...... .29 



15. Serum Inspissator . . . . . . -3 



1 6. D'Arsonval's Incubator . . . . . -33 



17. Schlosing's Membrane Regulator . . . -34- 



1 8. Gas-burner protected with Mica-cylinder . . '. -35 



19. Moitessier's Gas-pressure Regulator . . ... 36 



20. Koch's Safety Burner . . . . . -36 



21. Babes' Incubator . . . . ... -37 



22. Reichert's Thermo-Regulator . . . . . . 39 



23. Meyer's Thermo-Regulator . . . . . . 40 



24. Siphon Bottle, with Flexible Tube, Glass Nozzle, and a Mohr's 



Pinchcock ...*.... 42 



25. Dessicator ........ 43 



26. Method of making a Folded Filter . . . . -67 



27. Method of Inoculating a Test-tube, containing sterile nutrient jelly . 70 



28. Method of Inoculating Test-tubes in the preparation of Plate-culti- 



vations ........ 75 



29. Microscopical Examination of Colonies on Plate-cultivations, and 



Method of Isolating Colonies by Inoculation of Test-tubes . 79 



30. Method of dividing Potatoes . . . . . .84 



31. Method of Forming a Simple Moist Chamber . . -97 



32. Simple Warm Stage . . . . . . .98 



