...through it (b) two Lines long, a quarter of a Line broad, and placed perpendicularly below the Fully of the upper Arm (/), to receive a fmall Plate (z), one...half long ; and of fuch Breadth and Thicknefs, as lhat it may freely move up and down, and yet not have too much play within the Hole. Moreover, let...

...Ime broad, and placed perpendicularly below the pulley of the upper arm, to receive a fmall pkrte, one inch and a half long ; and of fuch breadth and thicknefs, as that it may freely move up and dowrr, and yet not hare too much play within the hole. This plate muft alfo have a frnall hook at each...

...below the pulley pf the upper arm, to receive a fmall plate, one inch and a half long ; and of ¿-.ch breadth and thicknefs, as that it may freely move up and down, and yet nut have too much play within the hoie. This plate muft alfo have a fmall hook at each extremity. And...

...upper arm, to re' ceive a small plate, one inch and a half long ; and of euch breadth and thickness, as that it may freely move up and down, and yet not have too much play within the hole. This plate must also have a small hook at each extremity. And as such a balance will hardly stand still...