Tllniteb States Department of agriculture, 
JBureau of plant Unfcustrg. 
jForest ffmtbologg. 
Brown University, 
Providence, R. I., 
June 13, 1914, 
Dr. B. L. Robinson, 
Gray Herbarium, 
Cambridge, Mass. 
Dear Dr. Robinson: 
I have developed some of the chestnut 
negatives, and find that the conditions and 
the time which I used yesterday appear to be 
about right. Possibly if it is a little 
cloudy sixty seconds will be better then forty- 
five. The first four exposures which I made, 
before the plate holder fitted as it ought to 
into the frame, are slightly fogged, but I 
think not to an extent that will spoil the 
negatives. Probably your own difficulty in 
regard to fogged plates arose from this same 
defect. The later negatives, after fixing the 
plate holder, appear to be all right. I will 
send you a print sometime, but I may not be 
able to make one until 1 return from Washington. 
Very truly yours 
Forest Pathologist 
JFC/GLW 
