Directions for use.--A sheet of silver must be attached to the wire connected with the centre plate A of the battery, and placed in the silver solution--prepared as directed below. The plate to be silvered is first cleaned with diluted sulphuric acid, and then attached to the wire, G, proceeding from the zinc plates D, D, and placed in the silver solution, opposite the silver plate attached to the pole F, and about half an inch from it. A slight effervescence will now be percieved from the battery, and the silver will be deposited upon the Daguerreotype plate, while at the same time a portion of the silver plate is dissolved. To prepare the solution of silver.--Dissolve one ounce of chloride of silver in a solution of two ounces of cyanide of potassium, previously dissolved in one quart of water. The oxide of silver may be used instead of the chloride. This solution is put into a tumbler, or other vessel. [Illustration: Fig. 21 (hipho_21.gif)] [Illustration: Fig. 22 (hipho_22.gif)] This battery with the necessary articles for using it may be obtained of E. Anthony, 205 Broadway, New York city. The other articles required by every operator may be simply enumerated, viz: Sticking, or sealing paper. A pair of pliers, or forceps. Porcelain pans or dishes, for applying the hyposulphite of soda and washing after the imagine is fixed, something in form like fig. 23. A support for holding the plate while being washed, like fig. 24. [Updater's note: Figures 23 and 24 were missing from the image set.] [Illustration: Fig. 25 (hipho_25.gif)] BUFF STICKS.--Fig. 25.--These are usually from one to three feet in length, and about three inches wide--some think two and a half sufficient. The underside, which is convex, is covered with a strip of finely prepared buckskin, or velvet, well padded with cotton or tow. All the articles enumerated in this chapter may be obtained, of the very best quality and at the most reasonable rates, of Mr. E. Anthony, 205, Broadway, New York. CHAP. VI. THE DAGUERREOTYPE PROCESS. The process of taking Daguerreotype pictures differs very materially from all others of the photographic art, inasmuch as the production of the image is effected upon plates of copper coated with silver. The silver employed should be as pure as possible; the thickness of the plate is of little consequence, provided there be sufficient silver to bear the cleaning and polishing--is free from copper spots, is susceptible of a high polish, an exquisitely sensitive coating and a pleasing tone. These qualities are possessed to an eminent degree by the French plates. Having already enumerated the various processes--and the apparatus necessary for the manipulation, I will here give a list of the chemicals to be used, and then proceed to explain them more fully. The requisite chemicals are--