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(473)
PHILOSOPHICAL
TRANSACTIONS.
Munday, June 3. 1667.
The Contents.
Experiments for Improving the Art of Gunnery; To find out the Point-blank distance; the Quantity of Powder, for the just Charge of any Peece; and what Gun shoots farthest. An Answer to some Magnetical Inquiries, formery published in these Transactions. Extract of a Letter from Paris, containing an Account of some Effects of Bloud Transfused, and of two Monstrous Births, &c. A Relation of two other Monsters, not long since produced in Devonshire. Some Observations made in Mines, and at Sea, occasioning a Conjecture about the Origine of Wind. An Account of a great number of Stones, found in one Bladder. The Description of a Well and Ground, in Lancashire, taking Fire by a Candle applied to it. An Account of Athanasii Kircheri CHINA ILLUSTRATA.
Experiments for Improving the Art of Gunnery.
The better to determine the three Grand Desiderata, in the Art of Gunnery viz. 1. The Point-blank distance. 2. The Quantity of Powder for the just Charge of any Peece. 3. What Gun (for Size, Bore, Weight, Metal, &c.) Shoots Farthest: The following Experiments are proposed and directed, by Sr. Robert Moray; to give occasion to such as are Curious in this Art, to improve the same, as they shall have opportunity. Who we cannot but suppose will be so generous, as to impart the Successes and the Events of their Tryals of this kind to the Pubisher of these Transactions; for further Improvement and Use.
I.
o know, how Far a Gun Shoots Point-blank (as they call it) that is, so near the Level of the Cylinder of the Peece, that the difference is either not discernable, or not considerable: On a fit plat-form, place and point the Gun at a Mark, as large as the Bullet, some 50. 60. or more Yards distant, so as the under-side of the Mark may be in the same Level orA a a
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