Coat over dry iodine to a dark yellow, and over the quick
till you see a good change, then back over the dry iodine
from two to three seconds.

Bromide of Lime, or Dry Sensitive.--This is a compound but
recently introduced, and is becoming somewhat of it favorite,
owing principally to the slight trouble it gives in its preparation,
and the tone it imparts to the picture. To prepare it,
fill your jar about half or quarter full of dry slacked lime,
then drop into it bromine, till it becomes a bright orange red.
The plate is generally coated over this compound,
after the iodine coating to yellow, to a violet, or plum color;
but it will work well under any circumstances, the color being
of little consequence, if coated from thirty to ninety seconds,
according to its strength.

Mead's Accelerator.--I merely mention this as being in
the market, not knowing any thing in regard to its merits.
The directions given for its use are as follows:
Mix one-third of a bottle with a wine glass full of water,
coat the plate over dry iodine to a dark gold color, then over
the accelerator to a violet, then back over dry iodine,
or chloride of iodine, from three to five seconds.

Chloride of Bromine.--M. Bissou, a French experimentalist, has found that
bromine associated with chlorine, prepared in a similar manner to chloride
of iodine, already described, a solution of bromine being substituted
for the iodine, is a very sensitive solution; by means of it daguerreotype
proofs are obtained in half a second, and, thus very fugitive subjects
are represented, making it the very best compound for taking children.