The History of the Royal Society of London for the Improving of Natural Knowle
The History of the Royal Society of London for the Improving of Natural Knowle
Thomas Sprat
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Oi R 4 i R 96" o7~6~ k 9 L 12 o. 6 R 4 2 L 64 O. O i R 4 4 I Q6 O. Q L 9 L 12 I. O R 4 L 96 O. O L, i Whence the ROYAL SOCIETY. 137 Whence you may be p leafed to obferve : Fir ft, that the recoil oftheSecondly, That about twelve grains of 'Powder /hoots wf deft from the Mark at all diftances above* mentioned, on... the fame fide that the recoil is made. Thirdly, That above Forty -eight Grains of 'Pow- der /boots wide from the mark, placed at nine foot from the Muzzle of the Fiece, on the contrary fide to that on which the recoil is made. TheCaufe of the fir ft I cannot doubt to be there- coil of the Tiece (from the Force of the Towder) before the Bullet be parted from it. Thefecond //, as I conceive, becaufe with lefs than twelve Grains the *Piece ceafeth to recoil before the Bullet be parted from it. Andwith more than twelve Grains the Bullet is parted from the Apiece before it hath recoiled fo far : A greater power not moving a greater weight fwifter (horizontally) in the fame proportion that it doth the leffer.
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