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We have analysed a specimen of yellow Japanese brass and found Iron traces.

At the presence time brass is always obtained by founding only copper with zinc (without zinc ore.) Probably there are in Japan several varieties of brass with variable quantities of copper and zine. Some few weeks ago there were rumours current in the mercantile community that the old Japanese zeni (cash) contained a considerable quantity of gold. At the request of a mercantile firm we analysed two kinds of cash, one being 150 and the other 100 years old. We did not find a trace of gold, but on the contrary a considerable amount of impurities in them, consisting of sand and clay.

The oldest zeni contained:—