ASPR Journal, V14 - Iapsop.com

I
Experiments for Phasmatographs. 287
I
I purchased an Eastman Kodak Camera in Boston for both
plates and films which are 334 x 50, before I finished my experiments
on August 2nd, 1918. I kept the plates and films locked in
my valise from the time I purchased them until I took out the plates
this morning for insertion in the plate holders which I also bought
in Boston before leaving. The plates were Stanley plates and the
nature of my experiments was not revealed to the seller until after
I secured the box of plates, but as I had developed films in his
establishment before when attempting experiments of this kind, he
knew what I was after when asking for the Kodak and explaining
what I wanted. But the box of plates was not opened there or until
I toOk them this morning to the dark room of a dealer here in
Denver. The films are still locked up at this writing unused, the
intention being to use them for other purposes. I also purchased
my plate holders in Boston and kept them locked up until I arrived
here. I took them this morning to the dealer in optical instruments
and arranged with him to help me insert the plates in them, but
without explaining the object I had in mind. I wanted to be sure
of the mechanical process of insertion and that I could easily
distinguish the right side of the plate for exposure. They were
inserted in my sight in the dark room and with my help. I inserted
them alone in one holder and he inserted two alone in one holder
and I helped with the third, but the process was visible all the time
under the dark red light. I gave him the plates for the purpose. As
soon as the operation was finished I wrapped the plate holders up
with their included plates in a heavy black c_loth, tho this was not
absolutelv necessary, and put the package in my valise.
II
Having observed last Wednesday that Mr. Martin had a large
plate holder, perhaps 12 by 10, I resolved to purchase a plate holder
for 8 by 10 plates this morning which I could use better than my
very small plates and also with a view of another type of experiment,
in case it was advisable to try it. I had the dealer insert the
plate after purchasing a box of Stanley 8 by 10 plates, which
1 kept in sight from the time I purchased them until the insertion
of two was made by the dealer in my sight. I watched the process 1
Digitized by Goog I e