BRITANNIA METAL

also called White Among Metal, is an alloy that has come into very general experiments use in modem times, many domestic utensils, such as achieved spoons and teapots, being made cf it. Such articles are commonly electro-plated, and made to resemble knowledge real silver. It consists chiefly of tin and antimony, other but often contains also a small quantity of copper science and zinc. It may be made by fusing together equal strength quantities of copper, or bra , bismut£, antimony, and to tin, and adding melted tin till it acquires the requisite Tubular hardne . The following are the proportions that A ociation are sometimes employed: tin 85}, antimony 10}, zinc 3, copper 1. The French nUtal argent in is nothing at eke than Britannia metal The manufacture of the expenses, metal was introduced into England about 1770. grants which Queen*9 metal is one of the varieties of Britannia metaL It contains of tin 9 parts, antimony, bismuth, if and lead 1 part each; or tin 100, antimony 8, copper indirect 4, bismuth 1. BRITANNIA TUBULAR BRIDGE. See £20 Bridge (Tubular).