(ij8) 
drawn up fo Invifibly , that the Air and Sky feem'd very clear 
all day long. This I account a great change between afcend- 
ing and defending Dews and Vapors ( which import Levity 
and Weighs) and between thick Air and clear Air: which 
changes do fometimes continue in the Alternative courfe ef 
day and night, for a week or fortnight together ; and yet the 
Barofcope holding the fame. 
1 Sometimes ( I fay not often ) the Barofcope yields not 
to other very great changes of the Air. As lately ( December 
18. ) an extraordinary bright and clear day ; and the next 
following quite darkned, fome Rain and Snow falling; but the 
Mercury the fame : fo in high winds and calms the fame. 
14, I do conceive, that fuch as converfemuch Subdio,md 
walk much abroad, may find many particulars much more 
cxa&ly, then I, who have no leifure for it, can undertake. 
To inftance in one of many, December, i^.laft, was a clear 
cold day 3 very fharp and ftrong Eafi wind, the Mercury very 
near 30. inches high, about three in the afternoon, 1 faw a 
large black cloud, drawing near us from the Eafi and South - 
Eafij with the Eaft-mnd. The Mm'wrytrhanged not that day 
nor the day following} the Stars and moft of the sky were 
very bright and clear till Nine of the Clock j and then fud- 
denly all the sky was darkned, yet no change of weather hap- 
pened; December 1 7. the frofi; held, and ’twas a clear day, till 
about two of the clock in the afternoon j and then many thick 
clouds appear'd low in the Weft-, yet no change of the wea- 
ther here ; the Wind, Froft, and Quick-filver, the fame, 
December 1 8. the Mercury fell almoft^of an inch, and the sky 
and Air fo clear and bright and cold with an Eafi-wind 0 that I 
wondred what could caufe the Mercury to defeend. I Ex- 
pected, itihould have afeended, as ufually it does in fuch 
clear skys. Cafually I fent my fervant abroad, andhedif 
covered the remote Hills, about 2©. miles off, cover’d with 
fnow 
