oes it mean the ammonium in a liquid or solid
form. 1. One may use a ruby light with safety in filling
plate-holders. It is wise not to hold the plate too near the
light. 2. Negatives should be washed at least half an hour in
running water, and one hour if one has not running water, changing
the water four or five times. 3. "Citrate of iron and ammonium" is
a double salt formed of ferric citrate and citrate of ammonium,
and comes in brown shining leaflets. Ask for "citrate of iron and
ammonium" when buying the ingredients for the formula.

SIR KNIGHT A. SMITH, Trenton, New Jersey, asks for a good
developing solution, how to polish ferrotype plates, and how to
keep films from curling when drying. Makers of dry plates always
put in each box of dry plates formulas for developing, with full
directions for preparation and use. These will always be found
reliable. In No. 786 will be found a simple developer for
instantaneous pictures, and we shall shortly publish a set of
formulas with full directions for use. In Nos. 797 and 805 will be
found directions for preparing a ferrotype plate so that prints
will not stick. If the prints are trimmed before toning, they can
be pasted before removing from the ferrotype, and thus most of the
gloss made by the plate will be retained. Films may be kept from
curling by soaking the film, after fixing and washing, in a
solution of one-quarter ounce of glycerine and 16 ounces of water.
Pin them at the corners to a flat board, removing all drops of
water with a soft cloth. Set the board in an upright position till
the films are dry. Do not use any more glycerine than the
proportions given, as it will make the negatives sticky.

* * * * *

RECALLED STORMY TIMES.

"Well, that looks natural," said the old soldier, looking at a can of
condensed milk on the breakfast-table in place of ordinary milk that
failed on account of the storm. "It's the Gail Borden Eagle Brand we
used during the war."--[_Adv._]

ADVERTISEMENTS.

[Illustration: Columbia Bicycles ad]

Walter Baker & Co. Limited,

[Illustration]

The Largest Manufacturers of

PURE, HIGH GRADE

COCOAS and CHOCOLATES

On this Continent, have received

HIGHEST AWARDS

from the great

Industrial and Food

EXPOSITIONS

IN EUROPE AND AMERICA.