two clasps, one fixed the other moveable, but capable of being fastened
by the thumb screw d, so as to secure the plate tightly upon the block.
This block turns upon a swivle, b, which is attached to the table
by the screw c, This block is only used for holding the plate while
undergoing the first operation in cleaning.
[hipho_11.gif]

Fig. 11, shows the form of Lewis' newly patented plate vice,
which for durability, simplicity and utility is preferable to all others.
It consists of a simple platform and arm of cast iron, the former,
a, having a groove, d, in the centre for fixing the different sizes
of plate beds, e--and the latter supporting the leaves, e f.
On this vice which is secured to a table, or bench, the plate
receives its finishing polish with rouge, or prepared lampblack.
Mr. Lewis gives the following directions for its use. "As the cam
wears tighten it with the adjusting screw (g) so as to allow the lever
(f) to fall back into a horizontal position; the plate being in its
place at the time. Oil the wearing parts occasionally."

Some Daguerreotypists, however, use a foot lathe with buff wheels
of various forms; but this vice is sufficient for all ordinary purposes.

V. COATING BOXES.--The usual form for iodine and
[hipho_12.gif]
[hipho_13.gif]
bromine boxes is see, at figs. 14 and 15. They are far
superior to those in use with the English operators.
Each consists of a wooden box (a,) having firmly embeded within it
a stout glass jar (c), the edges of which are ground.
Over this is placed the sliding cover b, double the length