2259. To Fasten Chamois and Other Leather to Iron and Steel

2259.    To Fasten Chamois and Other Leather to Iron and Steel. Dr. Carl W. Heinischen, of Dresden, gives the following receipt for the above purpose: Spread over the metal a thin, hot solution of good glue; soak the leather with a warm solution of gall-nuts before placing on the metal, and leave to dry under an even pressure. If fastened in this manner it is impossible to separate the leather from the metal without tearing it.

2260. Cement for Petroleum Lamps

2260.    Cement for Petroleum Lamps. A cement particularly adapted for attaching the brass work to petroleum lamps, is made by Puscher, by boiling 3 parts resin with 1 of caustic soda and 5 of water. The composition is then mixed with half its weight of plaster of Paris, and sets firmly in half to three-quarters of an hour. It is said to be of great adhesive power, not permeable to petroleum, a low conductor of heat, and but superficially attacked by hot water. Zinc white, white lead, or precipitated chalk may be substituted for plaster, but hardens more slowly.

2261. Cement for Attaching Metal Letters to Plate Glass

2261.     Cement for Attaching Metal Letters to Plate Glass. Copal varnish, 16 parts; drying oil, 6 parts; turpentine, and oil of turpentine, of each 3 parts; liquefied glue (made with the least possible quantity of water), 5 parts. Melt together in a water-bath, and add fresh slacked lime (perfectly dry and in very fine powder), 10 parts.

2262. Cement for Metal and Glass

2262.    Cement for Metal and Glass. Mix 2 ounces of a thick solution of glue with 1 ounce linseed oil varnish, or 3/4 ounce Venice turpentine; boil them together, stirring them until they mix as thoroughly as possible. The pieces cemented should be tied together for 2 or 3 days. This cement will firmly attach any metallic substance to glass or porcelain. (See last receipt.)