*9 _ _ A description of the Horizontal FrojeSUon.

doWn your Centers answering to them. For thefirst numberin the Table of Centers being taken from the decimal fcalcjand pricked down upon the North part of the Meridian from‘Z^( towards-N ) and it will reach to A. And so the secondnfrfnbet will be extended from Z to E, the third from Z to I)the fourth to O, the fifth to V,tlie lixth to M,and the seventh

and last to X.

t HaVm’ggone thus far, the rest will be casie ; For if you setydtrtfCddipMles from A , the first Center to a the first inter-^^tOiy, you may describe the first parallel of Cancer , and soif frstiri 'E the second Center, you extend to e, the second in-tersection yotr shall des cribe the second parallel pasting through€ •> and lo forward with the rest having due regard to everyintersection, with his proper Center : and thus are the paral-lels to be described,amongst which that which paste th through° ■> * s the Æquinocfiastand if it be true done,will paste throughW and F,each tenth parallel must be distinguistied with some-what a bigger line then the test, and where every fifth 6 t thirdwjll not conic in for want of due space , as about Cancer andCapricorn^ where they grow close, there may you put in everyfifth or tenth onely, which will serve in thole marrow spacesas well as'more,' ' .

'' * r ‘ . i

, 1 The Delineation of the Hour Circles.

F Mrst, you must prick down the North Pole, ( which in potstippositihn is elevated 51 x -'gr. ) in this manner. T a j, the complement of the latitude, viz. 38 gr. 30 min- alldhalf it, which will be 1 p J, seek then theTangent of 1 9 gr-iH 1!1 *

you shall find it to be 3^2 l ) take this Upon your decimal l

scale, and prick/it upon the North part of the Meridian f |0in IZ, fdyvards N,!you will find it to fall in P, that point P thes efore is the North Pole in this projection, through which all the jhouir^now to be drawn must paste.

Tdie first hout Circle to be described is the hour of 6 y up^ 11which all the fell have their depqndance i now to estect thibyon 'arc to look fbr die Secant of your latitude ( which i s abefore His) which will be found to be 160638, this num ^taken out of the decimal scale must be extended uponc>South end of the Meridian from f^ind you shall find it ^

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