Marine Glue, a solution of one part india-rubber, gently heated in mineral naphtha or coal-tar twelve parts, with the addition of powdered shellac twenty parts. Having been made, it is poured upon a slab to cool, and when needed for use is heated to about 250° Fahr. It is very adhesive, and unaffected by moisture. Another glue to resist moisture is composed of ordinary glue 1 lb. melted in skimmed milk two quarts, or of ordinary glue mixed with common chalk. A glue cement to resist moisture is made of glue 1 lb., black resin 1 lb., red ochre \ lb., mixed with the least quantity of water.