Paper, 'An account of an experiment made December the 26th 1704 to try the quality of air produc’d from gunpowder, fir’d in Vacuo Boyliano' by Francis Hauksbee Hauksbee writes: 'Upon making the late experiment of firing gunpowder in vacuo, it was hinted as well worthy of tryal, whether the factitious air of fir’d gunpowder was endu’d with any quality differing from common air.' Subject: Physics Read to the Royal Society on 21 March 1704 Published in Philosophical Transactions as 'An account of an experiment made Decemb. the 26th, 1704. To try the quality of air, produc’d from gunpowder, fir’d in Vacuo Boyliano' [1704]