ed with 2 oz. of water and allowed to
dissolve. It is then made up to 4 oz. with boiling water, and,
when cold, a solution of 1 dr. of ammonium chloride in 2 oz. of
water is added. As this mixture does not keep well, it should be
used as soon as possible after being made up.

The silk is soaked in the liquid until it is thoroughly saturated,
which should take about four or five minutes, and it is then hung
up to dry, suspending it, tightly stretched, from its two top
corners. The fabric when "salted," as this operation is termed,
will keep indefinitely. All these operations can be done in
daylight.

The next stage is the application of the sensitizer, for which
purpose the two following solutions must be made up and then
mixed:

Silver nitrate 120 gr.
Water 1 oz.

Citric acid 50 gr.
Water 1oz.

The mixture is spread evenly over the silk with a soft
camel's-hair brush. There must be no metal in the mounting of the
brush that is used.

Particular care must be taken to see that no particle of the
surface of the silk is left uncovered. The best way to insure this
is to brush the liquid over the silk, first in one direction and
then crosswise. The process of sensitizing must be done in a weak
artificial light, such as at night by ordinary gas or lamp light,
or in the very feeblest daylight.

The silk is then again fastened up and allowed to dry, but it is
now sensitive to the light and the drying must therefore be done
in the dark. It is ready for printing as soon as it is dry, and as
it does not keep well in the sensitive condition, it should be
used up within a few days at the most.

The printing, which is done in daylight, is carried on in the same
way as for printing-out papers, except that the silk should be
printed a little darker than usual. It will be found convenient to
gum the edges slightly, and then to fix the silk on a stiff piece
of paper before putting it into the printing frame. If this
precaution is not adopted there is a tendency for the silk to slip
or crease when it is being examined. The silk must be handled
carefully while in the printing frame for this reason, but apart
from that, there is no particular difficulty. The paper can be
taken off when the printing is finished.

Prints on silk are toned, fixed and washed in the same way as
ordinary silver prints. The washing should be thorough, and before
the prints are quite dry, they should be i