An Experiment on the Descent of Malt Dust in the Evacuated Receiver, at Gresham College. By Mr Fr. Hauksbee

difficult to judge to a nicety in so sudden a motion; but there was a sensible difference betwixt the rebound of those dropt in Vacuo, and those in Air condens'd. I could not observe that the small difference in the weight of the Marbles made any discernable alteration in their Resiliti- ons. V. An Experiment on the descent of Malt dust in the Evacuated Receiver, at Gresham College. By Mr Fr. Hauksbee. I Took some Malt dust, and having well dried the same, put a quantity of it into a fine Muslin Bag, where being loosely inclos'd, would upon shaking discover it self plentifully in the open Air, undulating and floating a considerable time before it would descend; but being included within a Receiver, from which the Air was well exhausted; and then shaken, the dust descended as a ponderous Body, precipitating in strait lines from the top to the bottom of a tall Receiver. London, Printed for Sam. Smith and Benj. Walford, Printers to the Royal Society, at the Princes Arms in St Paul's Church-yard, 1705.