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 representing the constitution of some European kinds of gun-metal.

The slight difference proves that the formula for casting Japanese guns has been given by the above named Europeans. A French chemist, Roux, has analysed Chinese gun metal and found

It will be remarked that the Japanese gun bronze resembles much more our old western metal than the Chinese alloys.

Another French chemist, M. Morin, published lately also several analyses of Chinese bronzes and obtained nearly the same results as M. Roux. (See Bulletin de la Société Chimique de Paris, 1874, No. 11, page 519.)

We have also analysed specimens of old Japanese bronze from vases and ornaments and found:—

The relatively large quantity of lead is perhaps added to promote the malleability and plasticity of the alloy.

Brass (Shin-chiu) was formerly made in Japan by smelting copper, zine and zincblossom (a kind of very pure zinc ore imported from China.) Ranzan gives the following formula:—