perte in bacteriology, analytical chemistry and dairy hy- 

 giene. 



PLAN. 



The duties involve-d in the organization ot' tlae Com- 

 mission will fall into four distinct lines of supendsion. 



1. Eegular arid ^ysteiTiatie medical exa.mination of" 

 the employees on the dairy fann, and a continuous knowl- 

 edge of their health and hygiene. 



2. Eegular and frequent chemical aanlj\siesi of milk, 

 together with frequent bacteriological examinations as a 

 "Detective control" over the methods employed in the col- 

 lection and handling of the milk.' 



3. Supervision oi the veterinai'y in the work of select- 

 ing and prot-ecting of the herds, detecting disease and ex- 

 cluding tuberculosis. 



4. Supervision of dairy hygiene in stables, in dwel- 

 lings, and in the detail of collecting, handling, refrigerating, 

 bottling and. transportation of milk. 



The combined result of such medical control of milk 

 productions was given the name of "Certified Milk." 



Let us investigate some of these headings more thor- 

 oughly and let iis see why these departmentts are neces- 

 sary. 



It is certainly of the greatest importance to exclude 

 persons coming in contact with infectious disease. Typhoid, 

 Diphtheria aaul Scarlet Fever epidemics have been directly 

 traceable to certain milk supply. Up to 1895, Hart, Busey 

 and Koben had collected 240^ such epidemics, and in addi- 

 tion Trask, in 1G09, adds 200 from tlie literature and spe- 

 cial reports. In both of these lists there are included only 

 those in which all this evidence was sufficiently definite. 

 The explosive onset and the distinct route (follows the 

 milk) are features which should pfe least arouse suspicion^ 



7? 



