found the best general effect, and the most certain result to
follow from the use of the vapor of chlorine--but this requires more
than ordinary care. I would, therefore, recommend the use of iodine.
Thus: to a few grains of iodine, add an ounce of warm water (which
will become tinged with iodine); when cold, to half a pint of pure
water in a new and clean coating box, put, of the above, fifty drops;
stir and mix well this small quantity of iodine in with the water; in
ten minutes this box will be ready for use. Great care and judgment
will be required in the application of this vapor to the plate; if the
plate remain over the vapor too long, the developed picture will have
a faint and misty appearance; if not exposed long enough, the "high
light" will be solarized. I have great hope of the ultimate use of
this process, as it is the only means yet discovered to be enabled to
secure specimens of extremes of light and shade, yet producing harmony
of effect; and I would call the attention of the profession to the
fact, that a plate may be exposed to the action of light for any length
of time (a thousand times longer than required to act for the lesser
quantity of mercury to deposit itself, or that amount necessary to form
a perfect specimen), and be restored by the application of any of the
vapors above mentioned, remarking that for extremes for solarization,
denser vapors will be required. Much remains to be done with this
discovery to the application of the Daguerreotype.

HUMPHREY'S JOURNAL OF THE DAGUERREOTYPE & PHOTOGRAPHIC ARTS.

The above-named publication is well known as the best and most valuable
one devoted to the Photographic Science in this country. Humphrey's
Journal made its appearance November 1st, 1850, and consequently is the
first and oldest serial offered to the Photographic world.

The art of producing Portraits and Landscapes by means of Light, has
recently taken a new and enlivening impulse, which will in all
probability lead to important and interesting results. No practical
Daguerreotypist, Photographer, or amateur, should be without the means
at hand for securing all of the information upon this subject. Each
should be ready to receive and apply the improvements as they may be
developed. In order to accomplish this, it is a matter of great
importance to the Practitioner or Experimenter that he should have a
reliable medium through which he can obtain information. In what
source