one of the metals. See Chemistry. By imparting hardness, it is a useful compound in the formation of several metallic alloys, as in the fabrication of printers' types, and the composition of foreign pewter. Eight parts of bismuth, five of lead, and three of tin, constitute what is called, after its discoverer, Newton's metal, which melts at the heat of boiling water, and may be fused over a candle in a piece of stiff paper without burning the paper. Plumbers' solder consists of one part of bismuth with five of lead and three of tin. With an equal weight of lead, it forms a brilliant white alloy, much harder than lead, and more malleable than bismuth, though ductile; and if the proportion of lead be increased, it is rendered still more malleable.