in the dark, although a bright light should be avoided.
Not so the next part of the process, viz; giving the plate its
extreme sensitiveness, or coating with the accelerating liquids.
In this great caution should be used to prevent the slightest
ray of light impringing directly on the plate, and in
examining the color reflected light should always be used.
A convient method of examining the plate, is to make a small hole
in the partition of the closet in which you coat, and cover it
with a piece of tissue paper; by quickly turning the plate so that
the paper is reflected upon it the color is very distinctly shown.
Most of our operators are not so particular in this respect
as they should be.

ACCELERATING LIQUID.--Of these there are several kinds, which differ
both in composition and action--some acting very quickly,
others giving a finer tone to the picture although they are
not so expeditious in there operations; or in other words,
not so sensitve to the action of light. These are adopted
by Daguerreotypists according to their tastes and predjudices.
They are all applied in the same way as the coating of iodine.
The following are the best.

Bromine water--This solution is much used in France, and, I shall
therefore give its preparation, and the method of using it,
in the words of M. Figeau. "Put into a bottle of pure water,
a large excess of bromine; shake the mixture well, and before using it,
let all the bromine be taken up. An ascertained quantity of this
saturated water is then diluted in a given quantity of distilled water,
which gives a solution of bromine that is always identical."
M. Figeau recommends one part of the saturated solution to thirty