Melt the paraffin under the iron so as to drive it into the
wood as much as possible, then with a cooler iron melt on a coat thick
enough to completely cover the wood. For brassing small articles: To one
quart water add half an ounce each of sulphate copper and protochloride
of tin. Stir the articles in the solution until the desired color is
obtained. Use the sulphate of copper alone for a copper color. A good
cement for celluloid is made from one part shellac dissolved in one part
of spirit of camphor and three to four parts of ninety per cent.
alcohol. The cement should be applied warm, and the broken parts
securely held together until the solvent has entirely evaporated. Tin
and tin alloys, after careful cleansing from oxide and grease, are
handsomely and permanently bronzed if brushed over with a solution of
one part of sulphate of copper (bluestone) and one part of sulphate of
iron (copperas) in twenty parts of water. When this has dried, the
surface should be brushed with a solution of one part of acetate of
copper (verdigris) in acetic acid. After several applications and
dryings of the last named, the surface is polished with a soft brush and
bloodstone powder. The raised portions are then rubbed off with soft
leather moistened with wax in turpentine, followed by a rubbing with dry
leather.
Protecting Water-Pipes Against Frost.--A device has been brought
forward for protecting water-pipes against freezing, the arrangement
being based upon the fact that water in motion will remain liquid at a
lower temperature than water at rest.
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