BOMB

a hollow explosive projectile ignited by a time fuse set in action on discharge, or by a percu ion fuse operating on impact. In modern war, bombs are thrown by hand, fired from a rifie, or dropped from aircraft. First used with effect by Japanese at Port Arthur (1904). Aircraft bombs were constantly employed in the World War. There are two main cla es: (1) high-explosive bombs, designed to damage works or personnel; and (2) bombs whose main object is the release of lethal or lachrymatory gas or of incendiary compounds, the former of which require a strong explosive to actuate them, and the latter only a light bursting charge,