the streight strook, this not being simplie true, I think it expendient before I wade anie further, to shew in what maner the blowes of the point are stroken circulerly, and how streightly. And this I will straine my self to performe as plainly and as briefly as possibly I maie. Neither wil I strech so farre as to reason of the blowes of the edg, or how all blowes are stroken circulerly, because it is sufficiently and clerely handled in the diuision of the Arme and sword.
Comming then to that which is my principall intent to handle in this place, I wil shew first how the arme when it striketh with the point, striketh circulerlie.
It is most euident, that all bodies of streight or longe shape, I mean when they haue a firme and immoueable head or beginninge, and that they moue with an other like head, alwaies of necessitie in their motion, frame either a wheel or part of a circuler figure. Seeing then the Arme is of like figure and shape, and is immoueably fixed in the shoulder, and further moueth onely in that parte which is beneth it, there is no doubt, but that in his motion it figureth also a circle, or some parte thereof. And this euerie man may perceiue if in mouing his arme, he make trial in himselfe.
Finding this true, as without controuersie it is, it shal also be as true, that all those thinges which are fastned in the arme, and do moue as the Arme doth, must needs moue circulerlie. Thus much concerning my first purpose in this Treatise.