An incendiary capsule was found in a ship which was set on fire on April 23, 1942. The
accompanying sketch is a full-scale drawing of the object.
A is a flexible, gelatine capsule, yellow and translucent, containing a
highly volatile fluid B. The outer surface C is covered with a
sticky, black, carbon or graphite compound. D is a hard, brown
casing, covering one-half of the capsule. This appears to be a magnesium
compound and burns fiercely when ignited.
The capsule is ignited by heat, a test showing that it became active when
placed in the sun, even when covered by a sheet of corrugated iron. It would
seem, therefore, that no very high temperature is required to cause the device
There is obvious danger that these capsules may be slipped into aircraft, motor
vehicles, supplies, buildings, or any vital place where the sun's rays or
artificial heat may ignite them.