Secret of Brasses. The Japanese are fanw not only for their skill In inaklnj; decorative articles, but for the beauty of tin) material ma-terial used. It is said that the secret of the composition of some of their alloys of br8 and cooper litis only lately bec-n revealed. The finest Japanese Japa-nese brass, called "slnclm," consists of ten part of copper and five of zinc. Another very beautiful alloy, named 'Slindko," to which splendid hues nrv Imparted by treatment with acids, Is fonned by inlxlns? gold und copper, the proportion of (fold vary. Ins from 1' to 10 per cent of the entire en-tire mass.