LIST OF ILLUSTRATIONS 



FIG. PAGE 



1. Bacillus enteritidis sporogenes. Typical milk cultures, after 24 



hours' incubation at 37 C. . . . . . . 10 



2. Bent glass distributing rod 20 



3. Apparatus arranged for filtering aspiration . . . 24 



4. Collecting bottle and tin . . . . . . . 29 



5. Savage's plate-cooling apparatus . . . . . 33 



6. Wilson's apparatus for concentration under reduced pressure 41 



7. Fraenkel's borer . . . . . . . ..** 68 



8. Collecting bottle and ice box . 86 



9. Dilution of milk samples . . . . . , . 88 



10. B. enteritidis sporogenes enumeration jar. . . ... 94 



11. Apparatus for estimating milk sediments 96 



12. Experimental tuberculosis in a guinea-pig (about the third week 



after inoculation) inoculated subcutaneously in neighbour- 

 hood of the left knee-joint ... . . . 102 



13. Centrifugal tube for leucocyte enumeration .... 106 



14. Agar plates exposed for 30 minutes in a school . . 141 



15. Sedgwick-Tucker tube . . t 143 



1 6. Frankland's tube ~ 144 



