ways between 2 and 3 Eights of an Inch difference betwixt 
them And having fometimes order’d my fervants to take 
notice of the Difparity, and divers times carefully obferv’d it 
my felf, when I pafs’d to and fro between Oxford and Stanton, 
I generally found, that the Oxford Barometer and the other , 
did, as it were by common con fen t 3 rife and fall together fo, 
as- that in the former the Mercury was ufually I higher, than in 
the latter. 
Which Obfervations may teach us, that the subterraneous, 
fteams, which afcend into the Air 3 or the other Caiifes of the 
varying Weight of th q A tmofph ere y do, many times, and at 
kaft in feme places, uniformly enough affedt the Air to a 
greater height, than, till I had made this tryali, I durff con- 
clude. 
But, as moft of the Barometricall obfervations are fubjedt 
to exception, fo I found the formerly mentioned to be. For 
( to omit leffer variations ) riding one Evening from Oxford to 
Stanton, and having., before I tookhorfe, look’t on the Ban ft 
eopem the former of thefe 2. places, I was fomewhat fnrprifed, 
to find at my co-mming to the latter, that in places no farther 
diftant, and notwithftanding the fiiortnefsof the time (which 
was but an hour and a half, if fo much ) the Barometer at Stan* 
ton was fliort of its ufual diftance from the other , near a quarter 
of an Inch , though, the weather being fair and calm, there ap- 
pear’d nothing ofmanifeft change in the Air, to which I could 
adferihe fo great a Variation , and* though alio, fince that time, . 
the Mercury in the two Inftruments hath, for the moft part, pro- 
ceeded to rife and fall, as before., . 
And thefe being the only Obfervations, I have yet met with, 
wherein Barofcopes 3 at fome Diftance of Place , and Difference 
of Height, have been compar’d ( though I cannot now fend you 
the Reflexions, I have elfewhere mady upon them i ) as the 
opportunity;! had to snake them my klf,. rendredthem not 
unpleafant to me, fo, perhaps the Novelty will keep them from > 
being unwelcome to you; And I confefs, I have had fome fly* 
ing fufpicions, that the odd Phenomena of the Barofe&pe , which 
have. hitherto more pos’d, thaninftrudted us, may in time, if a 
