( 47 ^' ) 
this Matter ; but the laft commended Author having m- 
genioiifly enquired thereinto, L (hall as briefly as may 
be fhew his Opinion. The Fountain of Heat enjoy’d by 
the Earth, being the Sun, and that Heat being not always 
the fame, he enquireth into the reafon why it is not fo. 
The Variation of the mutual Diftance between the Earth 
and Sun at the Apogee and Perigee^ the mutation of the 
Earth’s place in refpedt ol the Heavens, or its being juft- 
led at a greater diftance from the Sun, and the Obftrudi- 
on of the Solar Rays by the Spots on the Sun, he (after 
ingenious Enquiries and Calculations^ rejeds. • And as to 
the trueCaufes, having afligned good Philofophical Rea- 
fons for the Perpendicular warming more than the Ob- 
lique Rays, for the Wind cooling the Air, and the North 
and Eaft more than other Winds, he then enume- 
rates his Caufes in thefe Words; Ex ha^emts di^is 
ret, qu^nam ad Frigns hybernum prodneendum conenrrere 
pojjifit, Nh^tirum ex parte Solis requiritur in gens a vert ice 
dijiantiiij ^ exigua fupra Horizonte tnoras Ex parteTellu^ 
ris vero, Atntofphtsra exhaUtionibHs plena, nubibns gra^ 
vida-^ Ventique Orientates Septentrionales, pr<eferiim im- 
pel uop reqHiruntur* Omnium autem maximt neeejfarium, nt 
tones Solis d* diu, d^ turn imp^rimis impediantur^ quan- 
do caufd Frigoris concurrunt. 
Having thus afligned his. Caufes, he then applies them 
to his five Periods, and the more remarkable Accidents 
that happened in them. 
But after all, notwithftanding I like, for the moft part, 
his Caufes, as being thofe which are the common and 
ordinary ones, yet there are feme other more hidden ex- 
traordinary Caufes, that be hath not reached* For we 
have all his Caufes very commonly concurring in other 
Winters, without the fame EfFeds as in the Jaft* Yea 
this prefent, next fucceeding Winter 171I, we have 
had (befides what is common to all Winters, the Obli-. 
quity 
