r. If running water is not convenient soak the plate for two
hours, changing the water several times. The yellow stains may
sometimes be removed by soaking the negative for a short time in a
solution of one ounce sulphite of soda and nine ounces water, to
which a few drops of sulphuric acid have been added. Sir Harry
also asks what toning solution to use with the plain paper
described in Nos. 796 and 803. The combined toning solution used
for aristo paper is the best solution for the plain paper. It
works quickly, and gives soft clear tones.

SIR KNIGHT WILLIAM KELSEY asks if a combined toning and fixing
solution can be prepared for aristo-type paper--how long negatives
and prints should be washed in running water--and what use is made
of hyposulphite of soda and alum in developing negatives. A
combined toning solution for aristo may be bought ready prepared,
or one can prepare it at home. A formula comes with each package
of paper, and half the quantity given is enough to prepare at one
time, unless one has a large number of prints to tone.
Hyposulphite of soda and alum are used for fixing the negative
after developing. The hypo can be used for fixing without the
addition of the alum. The alum hardens and clears the film, and is
good to use in warm weather to prevent the frilling of the film.

SIR KNIGHT GEORGE H. BENZON, JUN., Philadelphia, Pa., asks for the
best solution for fixing plates. A solution of 4 ounces water and
1 ounce of hyposulphite of soda is the formula used by the editor
of this column both in warm and cold weather. In warm weather the
tray containing the fixing solution is set in a pan containing
pieces of ice, which prevents the frilling or softening of the
film. A formula for a fixing solution with soda and alum is given
in No. 808, answer to Sir Knight Frederick Kopper.

SIR KNIGHTS D. G. STANBROUGH, A. SMITH, HARLOW BROWN, and LADY
FLORENCE CRANE all ask for a good formula for a toning solution,
but neither one says for what kind of paper. The formulas for
toning baths are very numerous, and different chemicals are used
for different sensitive papers. As aristo paper is at present a
very popular paper, we give the following standard, combining
toning and fixing bath for prints made on this paper: Water, 10
ounces; hyp