April, ’18] 
BALL: FOULBROOD CONTROL 
203 
and a sign on this bridge offering for sale the hives, frames and comb 
distributed this material over a wide area on both sides of the river. 
Not all of this area has been worked over but every infection with the 
exception of one (the origin of which is not known) in the region tribu- 
oo 
Fig. 9. A part of Area No. 2 showing the method of distribution of American 
foulbrood in this region. 
tary to this bridge can be traced directly or indirectly back to this 
spot and to this method of distribution. 
Two apiaries within a mile of each other are particularly illumi¬ 
nating in this respect. Mr. SI. purchased a few empty hives from Mr. 
S. a number of years ago and placed them in a then prosperous apiary. 
Three years ago the last swarm of the apiary died and the entire out- 
