ILLUSTRATIONS. XIII 



Sterilizer containing racks for holding bottles 14 



Ropy cream lifted with a fork 31 



Bacillus lactis viscosus 31 



Germicidal action of freshly drawn milk 35 



Laundry in which milk cans were washed . 50 



Conditions surrounding a case of typhoid fever 51 



Blank for recording temperatures. 78 



Ear-tag for marking cattle 80 



Card employed by the writer for the identification of cows 81 

 Moak's card for identifying cows ... 83 

 Diagram showing improvement in dairy scores in Rich- 

 mond, Va. 104 

 Section of udder showing epithelial cells 134 

 Section of udder showing epithelial cells and polynuclear 



leucocytes . .. .... 135 



Fig. 17. Chart showing relation of municipal milk stations to infant 



mortality 171 



APPENDICES. 



Appendi.x A. Dair>' ordinance of Berkele_\ , Cal. 195 



Appendix B. Chicago tuberciilin test ordinance ^00 



Appendix C. Duluth milk ordinance inh 



Appendix D. Blank for reporting existence of infectious diseases 211 



Appendix E. Poster for dair\- barns -\1 



Index 214 



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