WALKING STICKS.
These may be made by inclosing half a grain of Brugnatelli's Fulminating Silver in a small fold of glass paper, and putting it into a ferule, which ferule may be placed gently on the stick; and on its being applied to the ground, a loud explosion will take place.
A vast number of other Fulminating objects might be prepared by the same means as here used, as it must have been observed, the Silver detonates either by friction or heat. But great attention must be paid to the quantity of Fulminating Silver used, as very unpleasant consequences might arise from the use of too large a quantity; and on the other hand, no effect produced by too small a quantity; but from one fourth to half a grain will most commonly be found quite sufficient for those purposes that require handling; and here again let me impress it on the mind, how necessary it is to pay attention to the quantities I have here specified for each object: and let me request that it may in no one instance be exceeded.
FINIS.
Printed by T. Hamblin, Garlick Hill, Thames Street.