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loses by Its Situation. That a Wheel or Clock may thus stand not only i nMquilibrium, but also Aseend upward, there is placed in the middle of theClost a Drum , which encloses the Spring of the Pendulum ; upon which Drumis fastned the stadita D F. For thus the Spring being Mounted, enforces theDrum to turn, and so to Raiso the Weight, which it cannot Raife withoutits becoming more Heavy, in regard that coming to the Point S, it is sar-ther srom the Center, than when it was in F, and thus all the TVheel turnson that fide, as the Spring gives way.

Äse. Maur.Whecler.n. i<Sl. j>. <5+7

eis. > 56 .

U ciostDeiten. VII. Älthough the Marquis tf Wortester is seid to have contrived a WutchMineJ * iy” ^at Ihotild Move upon a Declivity , and M. de Gennes has given some Account’ of a Clost Ajcendent on a Plain Inclined ; yet neither of them, nor any likethem, was ever scen by me, and- for ought I could ever learn, the l{estn oftheir Motions remains to this Hour as great a Leeret, as if they had neverbeen. I (hall therefore give an Account of a Mcvement,\'Austt I have design’ito meastire Time aster a Peculiar Männer.

i. The Exteriour Structure of it is a Cireular Body of Inches Dia-meter, consisting of two Plates mealured by the sinne Radius , and fixt in aParallel Position to each other by the Hoop h, the Breadth of which isaboutan Inch: This. Hoop and the two Plates Form the, Cafe of the Movemcnt ;of which, that which appears in the Front, is towards the Verge thereof In-scribed with a Horary Circle , the Divisions whereof anfiver the Hours of aNatural Day. The Deep Shades within this Circle are intended to reprdetua Concave, of near half an Inch deep; and the Prominence g, in the AJiciciieof this Concave, is a Hemilphere of Bfaß or Silver, riding loosty on a Pin,which lies hid, and Is the Axis of the Movemcnt. The Upper halt of thisidemifphere is hollow, but the Nether filled with Lead; and the final] Gen-tianam that Cts thereon, does with an Erected Finger persorm the Office ofan . Index. But this. heing only for Ornament, you may Substitute in theroom thereof any other Index, provided the Axis, whereon it is fiipporteii,move freely in the Hole H, and the lower part thereof I 1 L, so far prepon-derate to H P, as alvrays to keep it Pendulous, with its Point to the VerticiHour*

%•„ For the mannet of its Motion, as far forth as it appears outwardly; it isthus : S E reprelentsa Board or Shelf, of a Straight and Even Surface, about6 Foot long, and so Thiclcas not to be apt to Cast with change of Weather,aor to grow Camber under a sinall Weight ; on this is the Mwcment placed,and here to persorm its Course; and therefore I call fc> the- Stage of the Novtment. This Stage is Raised at the end S, about io Deg. above the Horizonor Line of Level HE; but this Angle of its Declivity DEH, is VariableThe two Plates which Form the Cafe of the Movemcnt, are.to beextant mround without the Hoop h, | of an Inch, and the Edges of ’cm lig]’ t, yIßdented. ; that while, the Movemcnt deseends upon the Stage , it nwy I lirnonly and not Slide. The Movemcnt being placed as high as it may, ne ^the point S, fhall Move downward towards E, with that flowneß, as to Finish«oe entire Revolution in 14 hours; and while, it does so, the Divisions on

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