gle; the lower angle is
intended to receive the warm water for keeping the gelatine mixture to a
proper temperature. Into this angle of the tray arrange another tray
somewhat smaller, and keep it from touching the bottom of the outer one by
the insertion of any small article that will suggest itself. Into the
inner tray the gelatine mixture is to be poured."

"The actual making of the tissue can now be proceeded with, and is so
simple and certain as not to be believed until put to the test. Purchase
a roll of paper-hanger's lining paper of good quality, cut it into widths
of about one and a half inch less than the width of your inner tray, and
in length of, say, thirty inches. For the success of the operation it is
necessary that the paper be rolled up the narrow way. Now having just
sufficient water at a temperature of 100 deg. Fahr. (38 deg. C.) into the
outer tray, pour the gelatine mixture into the inner one, and take one of
the lengths of rolled paper, and, holding it by both ends, gently lower it
on the surface of the gelatine; then at once slowly raise the end of the
paper, which will unroll itself and become beautifully coated in far less
time than it takes to describe. Twenty sheets may be coated in a quarter
of an hour, and be equal in all respects to that made by the most
expensive machine."

In the description of this method of coating, Mr. Harman does not explain
how the gelatine should be allowed to set before hanging up the paper to
dry, which is, however, obviously important. It is as follows: Place on
the tray a smooth board a little larger than the sheet of paper, leaving a
small space at the end furthest from the body, and slowly, without a stop,
draw off the paper, prepared side uppermost, on the board upon which it
should remain until the gelatine is set. If the paper curls up, wet the
back a little with a sponge before coating.

The following coating method, due to Mr. Chardon, is excellent for sheets
of paper of the ordinary photographic size, 18x22 inches.

On a glass plate placed on a leveled stand, is laid a sheet of paper
previously wetted, which is then flattened into contact with an India
rubber squeegee, taking care to remove the air bubbles interposed. The
quantity of gelatine necessary to coat the paper is regulated by means of
a glass rod held by an iron lath, which serves to handle it; at each end
of the rod is inserted a piece of an India rubber tube whose thickness
regulates