Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 507
r. Mortars.—A mortar is a piece of ordnance with thick walls and large bore, designed to throw shellsat high angles of elevation, usually 45°, thus obtaining a vertical tire. On this account, and forconvenience in loading, they are made stronger and shorter than other kinds of ordnance. They… … besides exercising also an additional destructive effect by the velocity of its fall. Mortars aremounted upon a carriage fixed upon a revolving platform, and are used afloat in small vessels espe-cially fitted for them. Rifled breech-loading mortars are now used by the principal European nations.…
Mechanical engineering -- Dictionaries
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