Page:Philosophical Transactions - Volume 024.djvu/332

Si tamen Extiterit aliquis ingenii adeò lividi & Sceptici, ut præmissis fidem detrahat; consulat velim Clariss. Schenkij Observat. cap. de calculo vesic. et tum forte concedat me non planê ἀδύνατα & ἀσύστατα hic loci tradidisse.

The Candent Iron being included in a Recipient proper for that purpose, and the Air withdrawn (which was in about two minutes of time) the Mercury then in the Gage standing at 29 inches, a quantity of Gunpowder was made immediately to descend upon the red hot Iron, which continu'd upon the surface of it some small time before it went off, and then was observ'd not to fire all at once; and the last of the Quantity that did so, seem'd to give the greatest flash: Upon which, the Mercurial gage was taken notice of to descend something more than an Inch, it rising again ⁠3/10⁠ of the same. And upon several Repetitions of the like quantity of Powder (the factitious Air being always first withdrawn) the Appearances were very resembling. Again, upon Purging the Recipient of the factitious Air, and the Mercury elevated in the Gage as at first, three quantities were caus'd to descend upon the Iron, whose Explosion, as well as the Air produc'd from them, seem'd in proportion to the quantity of Powder: The Mercury then in the Gage subsiding to 26. But upon dropping 6 Quantities (the Recipient being first purg'd as before) which Quantities not descending all at once, but successively as fast as might be, theQuan-