a ó N, A T .U R A : L-»- H I S T O R Y
on four days ; fevfen degrees on fiye days'^Tdigbt • • degrees- on three
days•nin°re£& on one d&y?Ji:Snd one dayit varied twelve "degrees;
yizf*'(M, the* 2 2d of July: whereas on the iame-dayMt- varied
with rr^&'iat Ludgvafi bdfe* foutc degrees. •-
From'the-following! table it will, appear howNmudb greater the
variation-of'the-Thermometer wasiat London than in Cornwall in
die Summer, Autumn, and fpring months; 1 7 5 6 ‘and’ 1^57.
Variation .of Farenheit’s Mercurial Thermometer.
J U L Y
In Cornwall. In London.
degrees. Days. Degrees. * Days.
M 1B1
No variation 5
agfteLO B
In Cornwall.
Degrees., | _.Days.
No variation 4
L R i0 :
London.
'.Degrees,
M A R C H 1757.
Iif Cöj^'wMl.. ',In London.
Degit^V Days.
I ~1 4 : {I B
■ 2 ( 1 3
3 f ■
' 4 t J
ia tio n 4
Higher in ;fee^ l
Morning than if 5
at Might
Degrees,'1 •" Days,
2
118
56<
7
10 o_
The. fcvpral degrees multiplied by the .days^will fh^^the1’ differ-
enee. The realon of this greater yariation of the >'L lierhiomete^ at
London than in Cornwall is, chiefly, that the.ii^|e^qait-gj^Ae ,fen-
Jbeams from a tradt ..of, land which, hgis no large .postiom df”fke>fta‘snear
it, makes it hotter at 'noon, and' consequently cge quickfilver
higher than in Cornwall and in Small illands, where there being a
greater quantity of lea than,of land, they want this-additional ,-hecit
and the quickfilver riles but a final! matter; ,on .the .other hand the
ceafing of this, reflection in the inland-parts by. the cqnilng^qn ,of
night, makes the Mercury link in proportion; whereas in'UprnWall,
as the noon is not hot, the night varies not„fo much from, the,.day,
dpedally if the day be cloudy, when I find the Mercury atj eight
or nine o’clock p. m. almolt as high as at noon, and the general
difference at a medium,, but one..degree. The greateft difference
in the height of the Mercury in Cornwall therefore, is between eight
at night and four or five in the morning.
It may not be amifs here to obferve how different the weather
is now and then in climates not very diftant: In the year 1751 we
had a very rainy lummer throughout England, Scarce two days
palling without frequent Showers, and the Mercury in the Barometer
very unfettled; in three days Space varying generally,-^
parts, of an inch. At the lame time, , in Italy prevailed an extraordinary
drought; the accounts from Parma, dated July 17,
running thus, “ Publick prayers .are Still continued in all. our
d According to the account publifhed at London of Mr* AyfcoughV obfervations.
churches.
O F C O R N W A L L. 21
churches, in qrder^tQLi|mpjof^the" Almighty to „fend down feme
mpvlrs of* rain t^'refrelh tfid jjuits o f the earth, which ,ath hl-
readv pfeltfv 'damaged' b|f She eifceffiYe drougnrwhich has raged
^ y lfejlllnnfid^rahl^tmie wfiichj’fliews that ms 1inconftant as1
the weath^ind winds ’iriay be^ thSAtmofplfet&may be ovfefeaded
with mpifiure in,'one rijace, and^ifiratly destitute forfeme months
tweifeelpin another place f not ver^mfiant; j^^plerity df rain here,T
it Teems, n ad ^M ^ a t^ fflty in Jt^y;A'ad^ tf^e^cannot ' be’ a 're^
pHElu^y iuKolie dlimat&'vvithout ^^fioning thfer^^fe?|n mother:
dlydetermined quantity ||p moifturans itidded allotmfl^'qy the great
■ IfftribuW'"pfi all things,A who' created h'is” blMlrigs rcafPand
meafure; blit he delivf fem em oqtm'us'dfirpldnty or felicity, as it
$ems'good to'.him'eith^To^rbip^pr cdrred: us; parftmdnious and1
refenfi|iras' i f may appC^totW at fiM fi^nt^uo ofi'c? part|'d^e&ry‘libefel'
to another, but really juA; graciqus^riff inv|ri^blf benefi'cenfeto the
whole.
h a ;:p , ; m .
Q j Waters in general, and ^thsfe l pff ‘Cornwall in particular.
WATER"h#wdverj afiehuated ^!dhgtiifed,d'is. Water-frill, &ECT'^f
particles imalt^^^mough the molt moveable
kind; consequently, all aqmtAfe|* pf .oc^^
dnwnifa| the moft r a ile d vapour, are'Jec^ally Witer, and will
|equire |feme n^fice.to ‘be taken oP'tfiefh, in t h i s W a t e r
dierefore "includes Vapour, Dew, Damps, Swings, g S l iS Brook,
River, Lake, and Sea.
' ;/'As Air is neceffary every minute tjo !® e faring hnd motion to sect in
the foiids as well as fluids rif all', b o d i e s , S r
liquids, whlcnare perpetually fliifting theif pl^pe, add without constant
Supplies would, leave thejlolids thejr depart from, me’er dull.
Water is. therefore“"(fillerled throughout the liniveffe,* in oi^er to ^
maintain the coheren^Eof all bodies, fuppi^ wafte, and prevent
the afeendency of Fire, ..which''^thout Wafer to .bppofe and ^ualif^
would parch and reduce all todies to a calx, ,to ,^es,;pr|^ d fr s . -
Particles of Water are generally allowed fp be'roubd as|'to figure.
'Ufciis figure indeed is not fp.be.demonftrated, bqt is in fe ed from its
fluidity, . Allowing then the figure of r^ nd’ *
fluidity mull; be an effential property of all qfantitie§ add aliem- ■
\;;h la g e l^ f ''^ fe i l^rffejes’ ;
. Not the effea of fire as feme philofophers have lately held,.
*' 6 -;: ■ bullets