*

( 59 1 )

Lee» Wbeel s indeed are better for Turning in a narrow Compaß than Highones : But it feems probable thut Waggons with four High Whcels, might beiö contrived, that there fhould be no great Inconvenience in that Respect: ;at Icast, lisch Waggons as leldom have occalion to turn (hört, as Carriert Wag-gons, and luch like.

The Difterence which you may obsorve in the eighth and eleventh Expe-riments, is agreeable to what is siid by S. Stcvinus, and Dr. Wallis , vi%.That if a Coach, cßc. must bc Drawn over Rough, Uneven Plaees, it is bestto hx the Traces to the Coach Lowcr than the Height of the HorfejShoulders.

14. ATable i* Foot long, wasscc withoneEnd St Inchcs Higher than theother End, and the Model being loaded as before, lds Weight by 6 Ouncesdrew it up the Tabie, when the four Bigger Whcels were on, thau when twoBigger and two l.css were on. Becaufe in the fälst Cafe there was alinost thelame Direktion of the Motion of the Model and ot the String that drew it ,but not in the fecond Cafe, when the Tore Axis was so much Lowcr than thetop of the Pulley.

. New fort of XVIII. This Calcßo goes on Two Wheels ; Carries one Person, is Lightl enough ; Tho’ it Hangs not on Braccs, yet it is eafier than the Common

n 172. ;.i'o 23 . Coach ; A Common Coach will Overturn, if one Wheel go on a Superfi-cies a Foot and a half Higher than that of the other, but this will admit ofthe Difterence of 5 j Foot in Height öf the Superficies, without danger ofOvcr-turning: We Chofe all the irregulär Banks, and sides of Ditchcs torein over • and I have this day feen it at five sevcral times, turn over andover, and the Horso not at all disorder’d. Is the Hcrse stiould Ix: in the hastunruly, with the help of one Pin, you Difängage bim from the Caleßo withoutany Inconvenience. I my sds have been once Gvcrturn’d, and hnew it i\nttill I lookt up, and faw the Whed'fiat over my Head , and if a Man weiltwith his Eyes stuir, he would imagine himfelf in the must fmooth way, tho 5at the fame time there be three Foot Difterence in the Height of the Gioundot euch Wheel.

i'bt Conti i\ an,- ev] a l'efpetualMotion j by M.

£\ßlained\ byD<\ Papin.

«. 177. 7.1240.PkZ. 184.

XIX. Let D E F, be a pair of Belloves 40 Inches long, that may bc openedby removing the part F, from E : Let them be exactly fhut every where,but at the Aperture E ; and let a Pipe E G, to or n Inches long, bc Sodvedto the find Aperture E, having its otlver end in a Vestel G, füll of Mcicu;y,and placed near the Middle of the Belloves.

A, is an Axis for the Belloves to Turn upon.

B, A Counterpoile fastned to the lowcr end of the Belloves.

C, a Weight with a Clafp to keep the Belloves uprighr.

Now if we füpposo the Bellcves opened onlv to f, or 4, feanding Uprighr,atid füll of Mercury, it is plain that the find nlercury being 40 Inches High,must Fall, as in the T orrlcellian Experiment, to the Height of about 2." Inches,and confcqucntly the Belloves must open towards F, and ieave a Vaculty there.This Vaculty must be iilled with the Mercury Afcending srau G through the

Pipe