LEAD n.
tarnished. It is both malleable and ductile, though with little tenacity, and is used for tubes, sheets, bullets, etc. Its specific gravity is 11.37. It is easily fusible, forms alloys with other metals, and is an ingredient of solder and type metal. Atomic weight, 206.4. Symbol Pb (L. Plumbum). It is chiefly obtained…
LEVEL n.
(below). -- Box level, a spirit level in which a glass-covered box is used instead of a tube. -- Garpenter's level, Mason's level, either the plumb level or a straight bar of wood, in which is imbedded a small spirit level. -- Level of the sea, the imaginary level from which heights and depths are calculated, taken…
LINE n.
the front and rear sight, at any elevation, when they are sighted at an object. -- Line tub (Naut.), a tub in which the line carried by a whaleboat is coiled. -- Mason and Dixon's line, the boundary line between Pennsylvania and Maryland, as run before the Revolution (1764-1767) by two English astronomers named Char…