xii LIST OF ILLUSTRATIONS 



FIG. PAGE 



33. Thermobacterium bulgaricum. Grown in sterile milk. Stained 



with methylene blue. The grains are round and dark 

 blue 30 



34. Thermobacterium bulgaricum. Grown in milk pasteurised by 



heating previously to 80 C. for half an hour. Stained 

 with methylene blue. The grains are long-drawn and red. 

 Capsule clearly shown . . . . . . .31 



35. Thermobacterium helveticum from Emmental Cheese. (After 



Freudenreich) . . . . . . . .34 



36. Streptobacterium casei from Danish Dairy Cheese ... 34 



37. Streptococcus cremoris (Streptococcus laclicus) .... 35 



38. Streptococcus cremoris (Storch's No. 18) . . . . .36 



39. Streptococcus thermophilus ....... 36 



40. Streptococcus lactis ........ 37 



41. Betacoccus from thin juice from Nakskov Sugar Factory . . 37 



42. Streptococcus liquefaciens (Freudenreich' s Micrococcus casei 



amari) ......... 37 



43. Streptococcus liquefaciens (Escherich's Streptococcus coli gracilis) 37 



44. Various Betacocci in Stab Cultures in Cane-sugar Gelatine . 38 



45. The Coli Bacterium which spoilt the Milk and Butter at Duelund 



Dairy in 1888. (After C. O. Jensen) .... 40 



46. Bacterium acidi propionici (a) . . . . . .41 



47. Bacterium acidi propionici (b). Grown at 39 C. ,. . .41 



48. Bacillus subtilis. (After Migula.) a. Active rods before spore 



formation, b. A piece of film. c. Kods with spores. 



d. Stained to show the flagellse 46 



49. Mycoderma cerevisice. (After Holm) ..... 50 



50. M onilia nigra. (After Burri and Staub) . . . .51 



51. Two Varieties of Penicillium brevicaule 52 



52. Kotting Swede containing numerous Pectin -fermenting Plec- 



tridia 57 



53. Milking Eoom at Fauerholm ...... 59 



54. Gurler's and Stadtmiiller' s Milk Pails. (After Conn) . . 61 



55. Cooling and Straining of Milk at Fauerholm. In the foreground 



Ice is being put into the bottom of BuscJc's Milk Pail . 78 



56. Jonas Nielsen's Steriliser 80 



57. Heine's Cleaning Separator . . . . . . .91 



58. Laval's Cleaning Separator 92 



59. Hygienic Stopper 93 



60. Orla-Jensen's Household Pasteurising Apparatus ... 97 



61. Bacterium bifidum, distinctly branched. From faeces of bottle- 



fed infant . . . . . . . . 101 



62. Kefir Grains, natural size. (After Kern] . . . .103 



63. Section through a Kefir Grain 104 



64. Leucocyte Sediment from the Milk of a Cow suffering from 



Streptococcic Mastitis . . . . . . .159 



65. Catalase Test Apparatus 160 



66. Gelatinous Types ...... .164 



67. Blown Types ...... .164 



68. Spongy Types . . . 165 



69. Cheesy Types . . . . . . . . . 165 



70. Apparatus for Reductase and Fermenting Test to take 200 



Samples . 168 



