shot tower(redirected from William Watts (inventor))
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A very high structure, usually cylindrical and constructed of brick, once used in making lead shot for muskets. At the top of the tower, a molten alloy of lead was poured through a coarse metal screen, forming small lead globules that solidified; these pellets became spherical as they dropped, finally falling into a container of water at the base of the tower.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.