113. To make hard sealing wax, 115 114. The art of manufacturing paper hangings, 116 115. To make elastic blacking for leather, 118 116. Sundry experiments, 119 CURIOUS ARTS. 1. WATER-PROOF GILDING AND SILVERING.--This kind of gilding, usually termed oil gilding, being the cheapest and most durable, is in general use for gilding or silvering letters on signs, labels, &c. and may be performed as follows:--Grind one ounce of white lead and two ounces of litharge, very fine, in a gill of old linseed oil, and if convenient, add nearly one-fourth of a gill of old copal varnish, and half an ounce of stone yellow; but neither of these last, are very essential ingredients. Expose this composition to the rays of the sun for a week or more in a broad open vessel, observing, however, to keep it free from dust. Then pour off the finest part, and dilute it with as much spirits of turpentine as will make it work freely with a brush or camel-hair pencil. (Oil that will answer exceedingly well for this purpose, may sometimes be collected from the top of oil paints that have been long standing, and may be used directly, without being exposed to the sun as directed above.) Whatever letters or figures you would gild, must be first drawn or painted with this sizing, the ground having been previously painted and varnished; and when the sizing is so dry as to be hard, but yet remains slightly adhesive, or sticky, lay on gold or silver leaves smoothly over the whole, pressing them down gently with a soft ball of cotton. The most convenient manner of performing this, is to lay the leaves of gold or silver, first on a piece of deer-skin or glove-leather, and cut them into pieces of a convenient size, by drawing a smooth (not sharp) edged knife over them. Then take a small block of wood, of a triangular form, about half an inch thick, and two inches in diameter, and bind a strip of fine flannel round the edges;--breathe on this, and press it gently on a piece of the leaf, which by this may be taken from the leather, and carried to any part of the sizing where it will best fit, and to which it will readily adhere: thus the sizing may be readily covered with the leaf, very little of which will be wasted. Afterward the whole may be brushed over lightly with cotton, or a soft brush, and the superfluous gold or silver will be brushed off, leaving the letters or figures entire. When the work has thus remained two or three days, it may be rubbed with a piece of silk, which will increase its metallic lustre. _Note._--It is very essential that the varnish of the ground should be thoroughly dry, that it may not be adhesive in the least degree, otherwise the leaf will stick where it should not, and materially injure the work. When plain gilding is required for vanes, balls, &c. the leaves of gold or silver may be applied to the