Summary

1911 Encyclopædia Britannica, Volume 11… (1911)

Mercuric fulminate is less explosive than the silver salt, and forms white needles (with 1/2H2O) which are tolerably soluble in water. The use of mercuric fulminate as a detonator dates from about 1814, when the explosive cap was invented. It is still the commonest detonator, but it is now usually mixed with other substances; the British service uses for percussion caps 6 parts of fulminate, 6 of potassium chlorate and 4 of antimony sulphide, and for time fuses 4 parts of fulminate, 6 of potassium chlorate and 4 of antimony sulphide, the mixture being damped with a shellac varnish
Source: Wikisource

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