Introduction

There are at present in service use only four sizes of L.C. (chemical) bombs. These are the 30-, 65-, 250-, and 500-lb. L.C. bombs. These bombs are designed an area by dispersal of their gas filling.

The 30- and 65-lb. bombs are constructed of  very light gauge metal, and are desig-ned to operate either by break-up on impact, or by functioning of their fuze. The 250- and 500-lb. bombs are made of slightly heavier gauge metal, and are nose fuzed to func-tion on impact with a target, or possibly for aerial burst, in the case of the 500-lb. bomb.