This is the second book in the series produced for the CIA and Special Forces at Frankfort Arsenal and issued in small, loose-leaf notebooks during the late 1960's. It contains such interesting devices as: Shotgun Grenade Launcher, Mechanically Initiated Fire Battle, Gelled Flame Fuels, Acid Delay Incendiary, Clothes Pin Time Delay Switch, Short- and Long-Term Time Delays for Grenades, Improvised Battery, No Flash Fuse Ignitor and much, much more. This book should not be confused with TM31-210, which contains only a portion of the material contained herein. 51/2"x81/2", softcover, illustrated, 137pp.