When dry they will be ready for exciting for the camera by the following process:

(These are supposed to be in six 1-ounce bottles with glass stoppers.)

1.
1 drachm of No.
4., 6 drachms of
distilled water.		2.
20 min. of No. 3.,
6 drachms of
distilled water.		3.
A saturated
solution of
gallic acid.
4.
25 grains of
nitrate of silver
to half an ounce
of water. Add 45
minims of glacial
acetic acid.		5.
2 drachms of
No. 4., 6 drs.
of water.		6.
Equal parts of
Nos. 1. and 2.
N.B.—This must
be mixed just
before using,
and the bottle
cleaned
afterwards.

To excite for the Camera.—Mix equal parts of Nos. 1. and 2., and with a glass rod excite the iodized paper and blot off; and it may be put in the slide at once, or the number you require may be excited, and put into a blotting paper book, one between each leaf, and allowed to remain until required to be placed in the slide.

Time of Exposure.—The time varies from three minutes to a quarter of an hour, according to the nature of the subject and the power of the sun; but five minutes is generally the proper time.

To bring out.—Bring out with No. 3., and when the subject begins to appear, add No. 5.; and when sufficiently developed hold it up, and pour water upon it; and then put it into hyposulphite of soda to fix it, for about half an hour

or more, and then into water: this is merely to fix it for the after process at your leisure.

To clean the Negative.—Get a zinc tray about three or four inches deep, with another tray to fit in at the top, about one inch deep; fill the lower tray with boiling water, so that the upper tray may touch the water; put your solution of hyposulphite of soda, not strong, in the upper tray, and then your negatives one by one, watching them with care until the iodine is removed; then put them in hot water, containing a small piece of common soda (the size of a nutmeg to about two quarts of water), for about ten minutes; pour off the dirty water, and then add more hot water, shaking them gently for a short time; pour off the water again, and then add fresh hot water, and let it remain until it is cold, after which take them out CAREFULLY, one by one, and put them in clean cold water for an hour or two; then take them all out together, and hold up to drain for a short time, and then put them between three or four thicknesses of linen, and press as much of the water out as you can; then carefully (for now all the size is removed) lay them out flat upon linen to dry.

Mode of Waxing the Negatives.—Melt the pure white wax over a lamp of moderate heat, just merely to keep it in a liquid state; then fill the same deep tray as above described with boiling water, and with another similar to the upper one before described (which must be kept for this purpose only); put a clean piece of blotting-paper in this tray, and lay your negative face downwards, and with a soft flat hog's hair-brush, about an inch wide, dip it into the liquid wax, and brush the negative over, when it will be immediately transparent, and it can be done so that there is very little redundant wax, after which it may be put between two or three thicknesses of blotting-paper and ironed, if necessary, which, however, should not be very hot, when it is ready to take positives from.

Positives on Negative Paper.—Take one part of the iodide of silver before described, and add two parts of water; then add as much iodide of potassium as will redissolve it. Brush your paper with the foregoing, let dry, put into water, and proceed, in all respects, as above described for the negatives.