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iu A Vertical Decliniug Plane. 32Then will che Angle at the Pole between the proper Meridian and theHour of 11 be 55 gr. 30 m. the Hour of 10 will be 40 fr, 30 m. diſtantfrom that Meridian; and che reſt in their order hie being noted inche ſecond Column, the Ark of the Plane will be found to be ſuch Num-bers as I have noted in the third Column. 5 fWich this Table thus made you may draw the Hour: lines, and ſet upche Style on either Face of this or the like Plane, the difference being onlyin the placing of the Subſtylar, and that is reſolyed by the ſighit of the

Diagram. fA third Example, f 4 Plane falliug near the Meridian.

After the like manner, if in our Latitude an upright Plane ſhall de-cline 85 gr. for the prime Vertical, the one Face of it being open to theNorch- weſt, and the other to the South. eaſt, we may in ſome ſort repre-ſent ĩt by the Vertical QZ H, and then working as before, a

1. The Angle Z P T, the Inclination of the two Meridians, will befound to be 86 fr. 3 m. ſo that P T the Meridian of this Plane will herefall between the Hour- circles of 6 and 7 from the Meridian.

2. The Ark PT, che meaſure of the Angle PC T, che height of thePole above the Plane, will be onely 3 gr. G.

3. The Ark Z. T, the meaſure of tlie Angle Z C T, the diſtance of theSubſty lar from the Meridian, 38 gr. 23 u.

4. The Table of the Angles at the polewill be alſo gathered, by comparing the Me- Latitude 55ridian of the Plane with the reſt of he D eclination nHour⸗-circles: For the Angle T PZ, be- Diff. Merid. 865 5tween TP the Meridian of the Plane, Pz Altitude Styl. 3 6the Meridian of the Place, and the Hour of Dit. Subſtyxl. 28 223 21 25 being 86 fr. 5 m. allowing 15 gr. for aan Hour, the Hour of 11 4 will be 78 gr. 3 5. and the Hour of 1,71 f.. S in. diſtant from the Meridian of the Plane; and ſo the reſt ofthe Hlours. Or becauſe the difference of Meridians 86 ge. 5 mn. reſolvedinto Time, makes 5 60. 44 n. and ſo che Meridian of clie Plane falls be-tween the Hours of 6 and 7 from the Meridian. I firſt place tiiis Meri-dian between theſe Hours, and then taking 75 Cr. the common meaſurefor 5 Hours, out of 86 fr. 5 n. there remains 1I gr. 3 u. for tlie Angleat the Pole between the Meridian of the Plane and che Hour ot 7. Again,I take 86 gr. 5 m. our of gr. the common meaſure of 6 Hours, aud

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