fixed a beam of wood, B, to prevent contact with the silver.
A binding screw C is soldered on to the silver plate to connect
it with any desired object, by means of the copper wire, e.
A plate of amalgamated zinc, D, varying with the fancy of the operator
from one half to the entire width of the silver is placed on each side
of the wood. This is set into a glass vessel, P,--the extreme ends
of the wood resting upon its edge--on which the acid with which it
is charged has no effect. The jar is charged with sulphurid acid,
(common oil of vitriol) diluted in eight parts its bulk of water.
The zinc plates of the battery have been amalgamated with quicksilver,
and when the battery is set into the jar of acid there should be no
action percieved upon them when the poles F, G, are not in contact.
Should any action be percieved, it indicates imperfect amalgamation;
this can be easily remedied by pouring a little mercury upon them
immediately after removing them from the acid, taking care to get
none upon the centre plate A.

Directions for use.--A sheet of silver must be attached
to the wire connected with the centre plate A of the battery,
and placed in the silver solution--prepared as directed below.
The plate to be silvered is first cleaned with diluted sulphuric acid,
and then attached to the wire, G, proceeding from the zinc
plates D, D, and placed in the silver solution, opposite the silver
plate attached to the pole F, and about half an inch from it.
A slight effervescence will now be percieved from the battery,
and the silver will be deposited upon the Daguerreotype plate,
while at the same time a portion of the silver plate is dissolved.

To prepare the solution of silver.--Dissolve one ounce
of chloride of silver in a solution of two ounces of cyanide