To the Coffee-house, where with Dr. Allen some good discourse about physique and chymistry. And among other things, I telling him what Dribble the German Doctor do offer of an instrument to sink ships.
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@samuelpepys from Wikipedia:
"Fulminating gold is a light- and shock-sensitive yellow to yellow-orange amorphous heterogeneous mixture of different polymeric compounds of predominantly gold"
and further:
"… it is best to avoid accidentally creating this substance by mixing gold(III) chloride or hydroxide salts with ammonia gas or ammonium salts, as it is prone to explosion with even the slightest touch."
@samuelpepys it sounds like a scam, Sam.
He tells me that which is more strange, that something made of gold, which they call in chymistry Aurum fulminans, a grain of it put into a silver spoon and fired, will give a blow like a musquett, and strike a hole through the spoon downward, without the least force upward.