LIST OF ILLUSTRATIONS. 



1. Jansen's microscope 2 



2. Mucor, general 18 



3. Mucor, zygospore 19 



4. Penicilliiim expansum 26 



5. Aspergillus glaucus 23 



6. Aspergillus fumigatus, A.nidnlans 23 



7. Cladosporium herbarum 24 



8. Spores of Alternaria 24 



9. Fusarium 24 



10. Oidium lactis 26 



11. Manilla Candida 27 



12. Yeast cell 29 



13. Spore-bearing yeast cells 30 



14. Wine and beer yeasts 32 



15. Wild and pseudo-yeasts 35 



16. Types of micrococci 37 



17. Types of bacilli 37 



18. Types of spirilla 37 



19. Involution forms 38 



20. The division of bacterial cells 41 



21. Mitosis in bacterial cells 41 



22. Stages in division of bacterial cells 42 



23. The formation of spores 44 



24. Location of spores in bacterial cells 44 



25. Spore germination 45 



26. Division forms of micrococci 46 



27. Division forms of bacilli 47 



28. Threads of Bact. anthracis 47 



29. Capsules (Bact. pneumoniae) 49 



30. Plasmolytic changes 50 



31. Nuclear division 52 



32. Distribution of nuclear substance 51 



33. Monotrichous bacteria (Msp. comma) 52 



34. Monotrichous bacteria (Ps. pyocyanea) 52 



35. Lophotrichous bacteria (Ps. syncyanea) 53 



36. Lophotrichous bacteria (Sp. rubrum) 53 



37. Peritrichous bacteria (B. typhosus] 53 



38. Crenothrix polyspora 55 



39. Chlamydothrix hyalina 58 



40. Cladothrix dichotoma 59 



41. Beggiatoa alba 60 



42. Pasteur-Chamberland or Berkefeld filtering apparatus 65 



43. Miescher's sac 68 



44. Amoeba vespertilio 69 



45. Stages in division of Amceba polypodia 72 



46. Multiplication of Coccidium schubergi 73 



47. Amxba proteus 83 



xix 



