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Pale Brass for Wire

Melt together 64 parts copper, 34 parts zinc, and 2 parts lead. metal rapidly combines with the fluid mass, and the addition is continued until an alloy is formed somewhat difficult of fusion, when the remainder of the copper is at once added.

The brass thus formed is broken into pieces and remelted under charcoal, and a proper ad- 3376. To Make Brass which Exdition of either zinc or copper made to bring pands by Heat Equally with Iron. It is it up to the color and quality desired. Small difficult to make a permanent joint between quantities of brass may be made by melting brass and iron, on account of their unequal the copper and zinc separately, pouring them expansion by heat. In a recent issue of the together and stirring vigorously. (See Cop- journal of "Applied Chemistry," a new alloy per Flux, No. 3470.) It is then poured into is given, for which the inventor claims an exmoulds of granite. Before being submitted pansion by heat so nearly similar to that of to the rolling press for reduction to thin iron, as to allow of a union between them, plates, it has to undergo the operation of which, for all practical purposes, is permaannealing. In the receipts which follow, it nent. This consists of a mixture of 79 parts will be seen that the larger the proportion of copper, 15 parts zinc, and 6 parts tin. copper, the darker the color, the greater the 3377. Το Harden Brass. Brass is density, and, to a certain extent, the tough-tempered or hardened by rolling or hammerness, of the alloy. Zinc lessens the weight ing; consequently, if any object is to be made and color. Tin gives it hardness and grain, of tempered brass, the hardening must be and lead toughens it and renders it fitter for done before working it into the required working. An application of these principles shape. will serve as a guide for the metals and proportions to be used to produce a brass of any description required.