mpound of bromine and chloride of
iodine. In mixing it, much depends upon the strength of the
ingredients; an equal portion of each being generally used. Perhaps
the best method of preparing it, is to make a solution in alcohol of
half an ounce of chloride of iodine, and add the bromine drop by drop,
until the mixture becomes of a dark red color; then dilute with
distilled water, till it assumes a bright yellow. Put about half an
ounce of this compound into the pot, and coat over it to a violet
color, change the solution when it becomes too weak to produce the
desired effect.

Another.--Mix half an ounce of bromine with one ounce of chloride of
iodine, add two quarts pure distilled water, shake it well and let it
stand for twelve hours then add twenty-five drops of muriatic acid, and
let it stand another twelve hours, occasionally shaking it up well.
Dilute six parts of this solution in sixteen of water. Coat over dry
iodine to a deep yellow, then over the sensitive to a deep rose
color--approaching purple--then back, over dry iodine from four to
eight seconds.

Roach's Tripple Compound.--This is one of the very best sensitive
solutions, and is very popular among Daguerreotypists. To use this,
take one part in weight, say one drachm, of the compound and dilute it
with twelve of water; coat over dry iodine to yellow, then over the
compound to a rosy red. The effect in the camera is quick, and
produces a picture of a fine white tone.

Gurney's Sensitive.--This is another preparation of bromine, and gives
a fine tone. To two parts of water add one of the sensitive, and put
just sufficient in the box to cover the bottom, or enable you to coat
in from eight to ten seconds. 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 seco