(477)
10. The Powder used in a Set of these Experiments, ought to be all of the same goodness.
11. The same Bullet is to be made use of, if it can be had, till the Figure of it be marred; otherwise another as near of the same Size, Shape, and Weight, as is possible.
12. The strength of the Wind, is to be observed at every time of Shooting; which may be done by an Engine, made by the lately nam'd Operator.
13. Observe also the Position of the Wind, with a Fane and Compass at every Shot.
14. Note also, at what Azimuth the Mark stands from the Gun.
15. Take precise notice, what effects the Wind hath every time upon the Bullet, in carrying further, in hindering, or turning it aside.
16. Note the Figure, dimensions and Weight of the Gun, Carriage and Wheels.
17. The platform to be very Levell.
18. The Wheels to be at every Shot placed in the very same place and position, to avoid inequalities.
19. Every thing to be exactly recorded in a Book, as also every Accident and Observation.
20. After all other Experiments are made, every Peece may be tryed with the right Charge of Powder, laying every time more and more Weight upon the Carriage; and at last fixing the Gun so, as it may not recoyle at all, observing every time how Far the Bullet goes, and how much less Powder than the full Charge will serve to Shoot the Bullet, when the Peece is fixt, as far as the Whole Charge does, when it recoyls freely.
21. Care is to be had, that the Experiments with the Wedge, Tampion, and the like, made for encreasing the force of the Powder, and the fixing of the Peece, do not endanger it.
III.1. The Long Guns are to be made without any Ring about the Muzzle.
The pieces cut of from the Muzzle, to be alwayes laid on the Carriage, when new shots are made, or their weight of Lead in a convenient Figure, that the recoyl may still be the same.
3. The Quantity of Powder, that Shoots furthest in an Ordinary Culverin being known, there needs no Variation of it in the Long one.
