fairly be presumed that a second judge of the
name flourished in this reign.

Substantially, then, my original Query yet remains unanswered,
notwithstanding C. S. G.'s obliging reply.

F. KYFFIN LENTHALL.

36. Mount Street, Grosvenor Square.

* * * * *

PHOTOGRAPHIC CORRESPONDENCE.

_Mr. Lyte's Treatment of Positives._--It would be quite superfluous, after
the very excellent communication of MR. POLLOCK, were I to give a detailed
account of my method of printing albumen positives, as, in the main, we
both follow the process of Mr. Le Gray. But as we both have our own
improvements on the original process, I will ask for space in which to
record our differences in manipulation.

First, in regard to the chloride of gold, I always find, and I believe such
is the experience of many photographers, that all salts of gold, though
they heighten the effect at first, have a slow, but sure, destructive
action on the picture.

Next, I find that acetic acid, by generating sulphurous acid, has a similar
effect, and my care was to try and make a solution which should be free
from these defects. I first take my positive, which, as a general rule, I
print at least half as dark again as the shade required. This done, I wash
it well with water, and next with salt and water in the proportion of about
half a grain per gallon, or quite a tasteless solution; this removes all
the nitrate of silver from the paper, or if there is any left, the bath of
salt decomposes it, leaving none in the texture of the paper to unite with
the hypo., which otherwise forms a sticky substance, difficult to remove,
which may be readily seen on looking through a positive which has been too
hastily finished in the usual way, giving a dark shade, and a want of
transparency to the lights. I then place the picture in a bath composed as
follows:

Sodae hyposul. 3 oz.
Argent. chlorid. 70 grs.
Potassii iodidi 5 grs.
Pyrogallic acid 1-1/2 to 2 grs.

The iodide of potassium I add on the same principle as MR. POLLOCK's iodide
of silver, but as being {16} more convenient, as immediately on being added
it decomposes some of the chloride of silver, and forms iodide of silver. I
am happy to find that MR. POLLOCK confirms me in the use of this salt;
which I had long thought to improve the tone of my pictures. The liquid,
which will become rapidly very dark coloured, must be set aside i