[ *32 ] 
6. Let us now fuppofe an Inhabitant {landing on 
her North Pole* where the Sun s Declination is al- 
ways the fame with his Altitude, and looking toward 
that Point of the Horizon where the firft Meridian 
(above mentioned) cuts it j and let him call that 
Point the South, fo fhall he have a Meridian fixt, 
which will determine the other cardinal Points on 
the Horizon j tho', ftri&ly {peaking, every Point of 
the Horizon to him is South: Yet, for once, let us 
fuppofe him to have an horizontal Plane, fixed with 
its South Point in this Meridian, and thence divided 
and numbered like the Horizon of a Globe : Put a 
moveable Ruler with Sights to. turn round the Cen- 
tre of this Plane, for obferving the Sun's Amplitude 
at Ri.fi ng and Setting s and a graduated Quadrant to 
be fixed in the North and South Line, with a move- 
file Index, for taking the Sun's Altitude, in palling over 
the Meridian. The fame Degree, or Part of a Degree, that 
gives him the Altitude, will alfogive him its Declina- 
tion, and he will have the following tPhanomena. 
The Sun will rife ii\ Degrees North of the Eaft, 
and going on ii2-§- Degrees, as meafured on the ho- 
zontal Plane, he will crofs the Meridian at an Alti- 
tude of 12^ Degrees ; then, making an intire Revo- 
lution without fetting, he will crofs it again at an 
Altitude of 48^ Degrees : At the next Revolution he 
will crcfs it as he culminates, at the Height of 75 
Degrees, being only 15 Degrees from the Zenith $ 
and thence he will defeend in the like fpiral manner, 
croffing the Meridian firft at an Altitude of 48! De- 
grees j then, at an Altitude of \z\ Degrees, and going 
on thence 112*- Degrees he will fet 22I Degrees 
North of the Weft, having been 4 Revolutions and 
and ; Parts of One above the Horizon. 
7 - 
