_Washing Collodion Pictures._--I have never offered to your readers an
opinion in photography without having _bona fide_ tested it, to the best of
my ability; and however correct my friend MR. SHADBOLT may be, chemically
and theoretically, I am convinced that in practice so good a tone is never
obtained in a positive collodion picture which has been washed, as in one
which has been instantly fixed with the old saturated solution of
hyposulphite of soda. The unpleasant tints obtained upon positive collodion
pictures, I believe to be much dependent upon the frequent washings in the
proofs. When a collodion picture is properly treated, it surpasses in
pleasing effect every other photograph.