440 



MILK 



Fig. 190. Showing relation of milk routes to diphtheria cases during the 

 outbreak at Dorchester, Milton, and Hyde Park, 1907. (Trask, Hygienic 

 Bulletin, No. 56.) 



JH, RBN, ETT, OH, JMB, and CFJ are the farmers producing milk. 



A is the milk dealer delivering milk in both Milton and Dorchester. B is 

 the milk dealer delivering milk in Hyde Park. 



The lines connecting the producing farms and the milk dealers show to 

 which dairy the farmer sold his milk. 



The large squares represent Milton, Dorchester, and Hyde Park. 



The dash-lines extending from A to B into the towns represent the milk 

 routes carrying the supposedly infectious milk. Each dot represents a case 

 of diphtheria and is placed on the milk route from which it was supplied. 



C, D, E, F, G, and H represent the other dairies selling milk. The lines 

 extending from them into the towns represent their routes and are inserted 

 to show their freedom from diphtheria cases. 



Reports of other milk-borne diphtheria epidemics can be found 

 in Swithinbank and Newman's Bacteriology of Milk and in Hy- 

 gienic Laboratory Bulletin 56. 



Septic sore throat is considered by some authorities the milk- 

 borne disease par excellence. Investigations of this disease are 



