Anybody any idea what this might be?
Hint – Its one of the elements, packed tight in a tin, exposed to the air, it makes quite a din. ANSWER – It is a phosporous grenade, used by the British Army for screening situations that require some kind of shrouded movement – though some consider it as much a weapon as it is a tool. So in answer to Syed’s comment, it is not a folly, quite the opposite in fact. The grenade is encompassed in a canister like a spraycan and when used, a high explosive core disperses the material. Phosphorus reacts instantly with air and the effect is one of quite dramatic appearance. The direction of the wind is an important consideration when using such a device, you dont want hot embers and acrid, burning smoke drifting in your direction.