1867 Six Hundred Receipts by John Marquart

600 MISCELLANEOUS VALUABLE RECEIPTS.

226

of potassa, and all is ready. Put in bottom of so lotion a piece of zinc about 2 inches long, 1 wide, and J in thickness. After cleaning, imraerse the article to be plated in the solution about half a minute, letting it rest on the zinc. Wipe off with a dry cloth and repeat once. Polish wath buckskin. Thickness of plate can be increased by repeating

No. 491. Gilding the Edges of Paper,

The edges of the leaves of books and letter-paper are gilded while in a horizontal position in the book- binder's press, by first applying a composition formed of four parts of Armenian bole and one of candied sugar, ground together with water to a proper con- sistence, and laid on by a brush with the white of an Qgg. This coating, when nearly dry, is smoothed by the burnisher. It is then slightly moistened by a sponge dipped in clean water and squeezed in the hand. The gold-leaf is now taken up on a piece of cotton from the leather cushion' and applied on the moistened surface. When dry, it is to be burnished, by rubbing the burnisher over it repeatedly from end to end, taking care not to wound the surface by the point. No. 492. To Silver by Heat, Dissolve I ounce pure silver in aqua-fortis, and precipitate it with common salt; to which add J pound sal-ammoniac, sandever, and white vitriol, and ^ ounce sublimate.