INTRODUCTION. Incendiary, smoke and practice bombs are covered in this section. They are for the most part like the high-explosive bombs in appearance but have for their main filling elements other than high explosive.

Incendiary bombs range in size from the 1-kg magnesium bomb to the 500-kg oil filled flam. The smaller types are ordinarily carried in containers and the larger bombs are car-ried in bomb racks like a similar size high explosive bomb.

Smoke bombs also are usually of conventional size and appearance. They have a fuze, usually mechanical, designed to operate on impact, which ignites a smoke producing composition.

Practice bombs are cheaply constructed. The great majority are built of concrete, a no-table exception being the rocket assisted practice bomb which is almost identical except for explosive charge with the high explosive bomb. They are built to simulate the service bomb in handling and ballistics. Most practice bombs have either flare or a smoke produc-ing attachment incorporated into the bomb in such a way as to mark the point of impact of the bomb.