Description: These cylinders are constructed of a light unidentified metal. They are filled with thermite and have an igniter located in the center of the top section.

Four types of cylinders have been recovered which differ as to type of casings and igni-ters. One casing is a plain cylinder, while the other type has vents around the top to al-low more rapid escape of the thermite. Both casings can be fitted with either a friction pull igniter or a scratch type igniter.

Both igniters are of conventional design and both employ a delay element and a 5-gram first fire charge of antimony sulphide, aluminum, and potassium chlorate. A circular piece of wood with rough sides is provided as a scratch block for the scratch type igniter. The block is wrapped in waxed paper and taped to the top of the cylinders in which is used.

Operation: Place the charge and initiate the igniter. After the delay time has expired, the first fire charge and then the main incendiary charge are ignited in turn.

Figure 198 – Metal Incendiary Cylinders.