0ii4) 
on Decern. 14. the wind had afhort fwing from the North-tve fl , 
and haftencd again toward the Baft , yet fo as to be Nmh-E aft. 
Durin^^this agitation, or change or Winds, the Mercury def- 
cendeda little-, andafter, upon the refetling qf the wind, the 
Mercury afcended a little higher , than it had been the day be- 
fore. 
My Houfe and Study , where I keep this Barofcope , is on 
the fide of an Hill-, on the higher fide of this Country , as I 
guefs near a level with the Head of a River -, which River, run- 
ningfl wly. and falling into the Severne-^^^ about 20. or 30. 
miles Weft-ward of Briftol , we cannot be very vouch above 
the level of the Sea. 
My Thermofcope, ftanding clofe by my faid Barometer, 
\vas at the juft highcof ordinary diflblving Weather. In the 
following dayes it was colder. Whether the late Summer- 
Aought^orwhatclfe, might incline this Winter-air to have more 
than ordinary Weight, or a ftronger Spring 5 I muft refer to 
the confideration of the more skilful. And if you pleafe to give 
notice for a general Obfervation , what Springs do now moft 
fayle, or more abound in any Vertue , Quality , or Quantity, it 
may probably be inftrudlive for divers inferences 5 and particu- 
larly 5 it may give fome degree of indication , Whether the 
Springs proceed from the fail of Rain , or by 'Subterraneous paf- 
fages from the Seas^or by change of Air into Water. 
But to returne to my Thermometer , I fliall give you fur- 
ther notice, that on Decemb^26, 166^. in the Morning , the 
Weather was colder than ever I found it , fince I could take it 
by the meafure of a Thermometer, that is, fince thefe 5. or 6. 
years. It was very cold and frezing quick fome dayes before, 
and ever fince: And yet in this time the Meicury hathfometimes 
fala mo;e than an Inch , without any other change of Weather, 
thanfomeguftsof wind, fome fprink- 
- r\.h rcxs ^rhun before the y of Snow ^ at fevctal times, m all, 
great Snor9 fell, r ^ i i j j 
fcarce enough to cover the ground 5 and 
fome abatements of Cold more efpecially when the Sun was 
up. 
I have examined my Ffhemeris from May 28. 16^4, till 
now : In all which time I find it not reinark'd for any fuch de- 
gree 
