EXPLAXATIOX OF DIAGRA3I I. 
The large square M X O P represents the town of Stamford. 
B is the dairy distributing the implicated milk, and the dash lines 
running from B into the city represent the milk route of this dairy. 
Each of the dots represents one case of typhoid fever and is placed 
upon the route of the dairy from which it was supplied with milk. 
There are 368 such cases on B's route, including the 12 around the 
Avhich is meant to represent the cafe supplied B. B supplied 
about one-eleventh of the milk used in the toAvn. 
H H and H are distributing dairies similar to B. 
C H and E B L are producing farms selling milk to B and also 
peddling some themseh^es. The dash line extending from E B L 
represents his personal route of 5 houses in Avhich 8 cases of typhoid 
occurred. 
J II B and J B II are producing farms selling milk to B and also 
to distributing dairies II and H H. 
The double lines shoAv the dairy to Avhich the producer sold most 
of his milk. 
Dash lines shoAv the apparent course of the infecti^^e agent. 
C, D, E, E, and G are other dairies having routes in Stamford. 
