The young gentleman and lady's philosophy : in a continued survey of the works of nature and art by way of dialogue . or. E L, The Ecliptic. NS, The Axis of the Globe.• riL X^^D ^^ T(tih 4 Jlcliptic ihe Shadoii G^. vl) for exiiibitirLP^Ji>e PjIitilS-OMEINnA. of ^-^ ^^^ SoIjAIIECIjIPSE^j^- and Lady*s Philosophy, ii^ Thirteenth^ The lower Part of the tranfverfe Piece is dividedinto Teeth, adapted to a fmall Pinion that you fee in the Side6f tlie Machine, by which Means this Piece, when the Ala-^hine is in Motion, carries the penumbral Shadow over theEarths Difk wit!i the proper Velocity o
The young gentleman and lady's philosophy : in a continued survey of the works of nature and art by way of dialogue . or. E L, The Ecliptic. NS, The Axis of the Globe.• riL X^^D ^^ T(tih 4 Jlcliptic ihe Shadoii G^. vl) for exiiibitirLP^Ji>e PjIitilS-OMEINnA. of ^-^ ^^^ SoIjAIIECIjIPSE^j^- and Lady*s Philosophy, ii^ Thirteenth^ The lower Part of the tranfverfe Piece is dividedinto Teeth, adapted to a fmall Pinion that you fee in the Side6f tlie Machine, by which Means this Piece, when the Ala-^hine is in Motion, carries the penumbral Shadow over theEarths Difk wit!i the proper Velocity of Amotion which theMoon really has at that Time iii h^r Orbit, or which thepenumbral Shadow really has on the Difk of the Earth. Fourteenth^ But as the Moons Motion is fometimes quicker,And fometimes flower, if we would be very accurate, therefliould be three of thofe tranfverfe Pieces, containinc^ each adifferent Number of Teeth of the fame Length, and fitted toexprefs the greateil, mean, and leaft Velocity of the MoonsMotion. Fiftte?ith, The Machinery is fo contrived, that the diurnalMotion of the Earth, and annual Motion of the Sun may beperformed in a fhort Space of Time, viz. The annual Motion in fix Hours
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Keywords: ., bookcentury1700, bookdecade1750, booksubjectscience, bookyear1759
