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Waterproof Starch

This is a French patent, and consists in passing the goods, after being properly starched, through a bath of chloride of zinc at a temperature of about 60° Fahr. The starch will then 6316. To Bend Gas Pipe. This may remain in the clothes after several successive be done by filling the pipe with melted resin. washings. 6311. Cement to Resist Sulphuric Acid. Melt caoutchouc by a gentle heat, add from 6 to 8 per cent. of the weight of tallow, taking care to keep the mass well stirren; add dry slacked lime, so as to make the fluid mass the consistency of soft paste; and lastly add 20 per cent. of red lead, whereby the mass, which otherwise remains soft, becomes hard and dry. This cement resists, according to Dr. Wagner, boiling sulphuric acid. A solution of caoutchouc in twice its weight of raw linseed oil, aided by heatir.g, and the addition thereto of an equal weight of pipe-clay, yields a plastic mass which also resists most acids.

When the resin hardens, bend the pipe, and it will retain its round form. Remove the resin by heating. 6317. Chewing Gumis made as follows:

Take of prepared balsam of tolu, 2 ounces (sec second receipt in No. 5102); white sugar, 1 ounce; oatmeal, 3 ounce. Soften the gum in a water-bath and mix in the ingredients; then roll in finely-powdered sugar or flour, to form sticks to suit.