June 2, 1910 
Dear Chamberlain:- 
Your letter of the 28th reached me just about as 
I was intenduing to do a little experimental work along a certain 
line of photography. I thought I woudl try experimenting with 
your negative. Haven’t had vory good luck, as you will see by 
the inclosed. I am afraid if a much greater enlargement is tried 
considerable will be lost in clearness. Is the inclosed anything 
Hire the size you want? and is it about what you want otherwise? 
The smaller print was made from the negative you sent, the larger 
one from a negative I made from the print. If this new negative 
is of any use toyou I shall bo glad to ddmate it to you. It is a 
3 1/4 by 4 1/4. 
There are several things that might cause bubbles on the films. 
From my own experience they can be formed by sudden changes of 
temperature between different baths, by a plain hypo bath instead 
of an acid one, and I think also (though I don’t know this from 
experience) from too long washing. I find it works very well to 
develop in the early evening, wash during the evening and hang up 
to dry in the late evening. I thin k your idea is correct in regard 
to blue'prints though I never made one. 
Father an nother arc planning to celebrate their golden wedding 
on the 24th of the month. 
Cordially 
