( 640 )

Minutes and Scconds the IT Wehes do point, (which Time, if the Matches b enot set to the Right Mea(ure, is hy the known Daily DiflFerence to be Ad-iustcd,) adding thercnnto the JEquation os the prefent Day, which gives youthc time os the Day, shcwed by the Sun, at the Place where the Watches were(et : And is this time os the Day be the fame with that obferved where youare, then you are under thc fame Meridian wirb the Place where the Watcheswere (et by the Sun ; but if the Time os the Day, obferved where you are,be greater rhan that shcwed by the Watches, you may be aflured, that you.are come under a more Eaflerly Meridian ; and if lefs, you are come un-der a more Westcrly. And Counting for every Hour os Difterence of T ime,j y Degrces of I.orgitude, and for every Minute, i y Minutes or of a De-grec, you sliall then know, how many Dcgrees, Minutes, £>c. thc find hlcri-"dians do Differ from One another. A. g. Suppofe the Watches A, B, C, wereSet at thc Place, whence you parted, on the acth of Fcbruary , to the time ofDay obferved bv the Sun, abating the ALquarion of thc loth of Fcbruary, {vi^.z'. z'i".) and suppofe that the PTWeb A, be (et to its Right Meafure,butthat B goes every Day 7". too Slow, and C every Day 12.". too Fafh.Some Days aster, (iippole the yth of Ahn, dchring to know the Longitude ofthe Place where you are at Sca ;

You Oblervc the Time of the Day there to be-

And you find the ITatch A to point Kt--

But the ITWch B to point at-

Going too Slow by 7''. every Day, which makes in 74 Days,"

(vis;. From the xeth of Fcbr. to the yth of Af<»>■,'-

that of thc IT Web A,

You lind also rhe IVatch C to point at- — -

Going n ,/ . too Fast every Day, which makes in 74 Dayr-VVhich bcing Subducted from its own Time, gives again—Tite Time of the Day therefore by thc PT 7 atchcs Ding ——Add thcrcunto the Altjuatic» of thc yth of

Watches were fet-

But the Time Obferved beingExcceds this by

Wherefore the Meridian of thc Place, where you are Mayis more Eastcrly, than the Place where thc TTatchcs were Set tWhich being rcduccd to Degrces, reckoning iy Dcgrees fan Hour, comes to-

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’Tis true, tltat from the farne Reckoning it may be concluded, thatyou are 1 80 Dcgrees more Eastcrly, which happens, becaufe thc Jlour Indexgoes round in the (pace of iz Hours in the Watches ; but the Differcnceis so great, that one cannot be dcceivcd in it; elfe the Watch might be somade, that the Index sliall go round about oncc in 7.4 Hours.

6. Since that for hnding the Longitude, the'Time of the Day, at the Placewhere you are, muff be known, (as bath been faid abave) you must have a

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