498 Journal of Agricultural Research Vol. Ii, No. 6 
effort was usually made to expose plates at stations where there were 
many diseased trees to the windward. 
te 355 
EXPLANATION 
~, Location ofan 
© éxposure Station i 
M)werer Spore - Trap 
© Chestnut Tree 
0 Trees orher than 
Chestaut | 
HAY FIELD 
CORN STUBBLE 
50 feet 
Fic. 2.—Map showing the location of some of the important outlying exposure-plate stations. Station 51 
is at the comer of tne plot represented in figure x. 
During wet weather the routine was often varied considerably, espe- 
cially just after the cessation of a rain. At such times plates were often 
exposed in more rapid succession, even to the extent of exposing several 
in different locations at about the same time, 
