human
will you kindly ask MR. LYTE for me, if he will be so good as to explain the discrepancy which appears between his
gpt
as given in the Journal of the Photographic Society of Sept. 21, and
human
N. & Q. of Sept. 10? In the former he says, for sensitizing, take (amongst other things) iodide of ammonia 60 grains: in
gpt
N. & Q.,