I

22

Archimedes ; or, Lib.i.

same proportion to the weight O, asthe distance C A , doth to the otherC which, because it is octuple inthe present example, therefore it willfollow that one pound at B, or E, willequiponderate to eight pounds at A,or D, as is expressed in the figure.The ground of tyhich maxime is this,because the point C, is supposed tobe the center of gravity, on eitherside of which, the parts are of equalweight.

'■ And this kind of proportion is notpoly to be observed whenthepotfertrof n press downwards,(as in the formerexample) but also in the other species' of violent motion, as lifting, drawing,and the like. Thus if the prop or ful-ciment were supposed to be at the ex-tremity of the Reaver,

A 3 B ^9 xz

A A

C

Aa