Bock II. Mechanic Powers. 57
the Wheel B with its Axis is 431, to which the rubing upon ofthe other Wheel C with its Axis is equal; and therefore the underWheels the diameter whereof is only double to the diameter ofthe axis of the bell, the rubing upon is as 862 to the rubing up-on which is as 1200; If therefore the diameter of the Wheelsto the Axis of the bell be not only double, but triple or quadruple,the rubing upon will be much leſſer, and the facility in carryingthe bell greater.
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BOOK III.
363ö535dPL—
Fig. 45, 46. Xes in Peritrocbio, Which in Latin they callSuculum, or MWindlace; It conſiſts of a lin-der, or round piece A B, to which is fixt an Axis C D, it hath.alſo handles or radius's fixt to the Cylinder; about the Cylinder arope is turned to which the weight is faſtned; ſometimes the AxisC D, is parrallel to the Horizon, as in Fig. 46, and ſometimes it isperpendicular to the Horizon, as in Fig. 45. and may be variouſſymade, and yet its eſſence; or being, remain unchangeable, andthe ſame power perſevering in augementing; For whetherthe handles be immediately fixt to the Olinder, as in Fg. 46,or wliether they be fixt to the Circumference of the Wheel, asin Fig. 45. it differs little, for the true length of the radiusis the diſtance of its end from the Axes.
1 PROPO&.