C *3+ ] 
Meridian at an Altitude of 4 if Degrees : At the fourth 
Revolution hecrofles it at an Altitude of 5 Degrees ; 
and going on thence 45 Degrees, or f of a Revolu- 
tion, he fets in the South-Weft. 
10. The Sun being thus for half a Year together 
above each Pole of Venus in its Turn, will caufe the 
whole Year at her Poles, as well as at the Poles of 
our Earth, to contain only one Day and one Night : 
But there, the Difference between the Heat in Sum- 
mer and Cold in Winter (or of Mid-day and Midnight) 
is greater than betwixt the fame on any two Places of 
our Earth; becaufe, in Venus, the Sun is Tor .half a 
Year together above the Horizon of one or other of 
the Poles ; and for at leaft \ of a Revolution (or about 
16 of our Days) within 20 Degrees of the Zeniths 
and during the other Half of the Year, always below 
the Horizon ; and for a confiderable Part of that Time, 
at leaft 70 Degrees. from it: Whereas at the Poles of 
our Earth, tho* the Sun is for half a Year together 
above the Horizon, yet his Altitude is never more 
than 23-*- Degrees above it in Summer, nor his De- 
preilion greater than that Quantity below it in Win- 
ter. When the Sun is in the Equator, he is feen in 
the Horizon of both Poles ; one Half of his Difc 
above, and the other below : And defeending quite 
below the Horizon of one Pole, he afeends in a vifi- 
ble Spiral above that of the other, until he comes 
within 16 Degrees of the Zenith , where he keeps the 
fame Altitude nearly for fome time > then defeends in 
the like fpiral manner, till he gets below the Hori- 
zon, where he continues invifiblc for the other Half 
of the Year. This will occafion to each Pole one 
Spring, one Harveft, a Summer as long as them both, 
and 
