"Priestley, and... Mr. [John] Warltire, had already experimented on this... with a detonating globe of the same kind as... Cavendish's Eudiometer. Their experiments were made partly in metallic, partly in glass vessels, and when employing the latter, they observed a deposition of moisture follow each explosion, but Priestley paid no attention to this... and Warltire referred it to the condensation of water which had been diffused in the state of vapour through the gases. ...Cavendish ...from the first appears to have anticipated that in the deposited water would be found the oxygen, which disappeared during the combustion of hydrogen in air, and the explanation of the diminution in volume which attended the vitiation of air."