CHAPTER V.
To make Plates for the Daguerreotype--Determining the Time of Exposure in the Camera--Instantaneous Process for Producing Daguerreotype--Galvanizing the Daguerreotype Plate--Silvering Solution--Daguerreotype without Mercury--Management of Chemicals--Hints and Cautions--Electrotyping--Crayon Daguerreotypes--Illuminated Daguerreotypes--Natural Colors in Heliography--Multiplying Daguerreotypes on one Plate--Deposit in Gilding--Practical Hints on the Daguerreotype.
TO MAKE PLATES FOR THE DAGUERREOTYPE.
I do not give the method employed by our regular plate manufacturers; this is not important, as the operator could not possibly profit by it from the fact of the great expense of manufacturing.

The following will be found practical: Procure a well planished copper plate of the required size, and well polish it, first with pumice stone and water, then with snake stone, jewelers' rouge.

Plates can be purchased in a high state of preparation from the engravers.

Having prepared the copper-plate, well rub it with salt and water, and then with the silvering powder.

No kind answers better than that used by clock-makers to silver their dial-plates.