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Another (Melt together oz Shruff brass)

Melt together 8 oz. Shruff brass, 2 lbs. regulus of antimony and 10 lbs. tin.

This is fit for use as Britannia metal.

German Tutania. in soldering cast-steel, etc., as it fuses with less heat, and its whiteness has a better appearance than brass.

Brass Solder for Iron.

Thin plates of brass are to be melted between the pieces that are to be joined. If the work be very fine, as when two leaves of a broken saw are to be brazed together, cover it with pulverized borax, melted with water, that it may incorporate with the brass powder which is added to it; the piece must be then exposed to the fire without touching the coals, and heated till the brass is seen to run.

Tungsten Steel.

Experiments have been made at Vienna, Dresden, and other places, in the use of tungsten or wolfram, in the alloying of steel, and some extraordinary results are stated to have been achieved. It is said that steel alloyed with 20 per cent. of tungsten produces a mixture, which, while it retains all the general qualities of steel, is so excessively hard, that tools made of it will cut, without difficulty, the hardest cast-steel.

A New Silver Alloy.

M. De Ruolz and De Fontenay, of France, have lately obtained, after several years' experiments, a new alloy, which may be very useful for small coin and for many industrial uses. It is composed of silver, 25 to 30 per cent. of nickel, and from 37 to 50 per cent. of copper. Its inventors propose to call it tiers-argent, or tri-silver. Its preparation is said to be a triumph of metallurgical science. The 3 metals when simply melted together form a compound which is not homogeneous; and to make the compound perfect, its inventors have been compelled to use phosphorus and certain solvents which they have not yet specified. The alloy thus obtained is at first very brittle; it cannot be hammered or drawn, and lacks those properties which are essential in malleable metals.

But after the phosphorus is eliminated, the alloy perfectly resembles a simple metal, and possesses, Melt together 2 drs. of copper, 1 oz. of regulus in a very high degree, the qualities to which the of antimony and 12 oz. of tin.

Spanish Tutania.

To 8 oz. of scrap-iron or steel, at a white heat, add 1 lb. of antimony in small portions, with 3 oz. of nitre. Melt and harden 1 lb. of tin with 2 oz. of this compound. precious metals owe their superiority. In color it resembles platinum, and is susceptible of a very high polish. It possesses extreme hardness and tenacity. It is ductile, malleable, very easily fused, emits when struck a beautiful sound, is not affected by exposure to the atmosphere, or to any but the most powerful re-agents. It is without odor. Its specific gravity is a little less than that Melt together 20 parts of copper, 15.8 of nickel, of silver. An alloy possessing these qualities 12.7 of zinc. must be very useful to gold and silversmiths. It German Silver.