a letter from the reverend henry miles d. d. to mr. henry baker f. r. s. concerning the difference...
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A Letter from the Reverend Henry Miles D. D. to Mr. Henry Baker F. R. S. concerning theDifference of the Degrees of Cold Marked by a Thermometer Kept within Doors, or withoutin the Open AirAuthor(s): Henry MilesSource: Philosophical Transactions (1683-1775), Vol. 44 (1746 - 1747), pp. 613-616Published by: The Royal SocietyStable URL: http://www.jstor.org/stable/104882 .
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IX. A Letterfrom the Reverend Henry Miles- D D. to Mr. FIenry Baker F. R. S. cor-- cer?ing he Difference of the .iDegrees ofD Cold marked bya Thermometer keptwxthr Doors, or withoat ir the oper Air.
q:)evr Sir, ReadDec. IO.t SEND you herewith an Extradc from- 747 1 my Regi0cr of the Weather) {hesvin", the State of my Barometer and Thermonlcters, for fiome I:)ays of 1aR \Veek: in 5rllicll you nvill obServe a fudden Change of the Temperature of the Air particularly on thgrJ<day Morlling tlle sd IlittantJ and, by tne fanze, you may fee the little USe a Thermometcr is of, wvhen kept within-doors to dcternzine the State of the Air abroad, as to Heat or Cold.
I hante t-xroTllermometers filled witll itNerctwrX, and of the fame ConArtuAion, tuade by the late sKlr. Sif: J^on, in the Strand. The one is placcd withollt ny Chamber-\&?irldox^, in a Ntorth-ea{} Situation, under Covert, contriv'd to admit a free PaCage of tllc Air} btlt tc> keep off Sun and Rail; tlle otlucr Ilangs writhin the NVindost} about tluree Feet fronz tlle formcr, nv'lere tnt Sun nes?er falls on ir: Tile R:oom is conSantly occusJied, as a Red-Chatulre£, lJut 11as had no Fire in it ehis SeaGon.
It appears by t!c ad joillingTable) tllat on Sfday tile 11l inftallt, at 8 ill the lMsorning thc Tllcrillo- rseter without llood at I7 Degr^Cs abore o. or freczing Poirlt; that 5vittlin at I4* At g At tCtelltj, that NZitllout ras at 0, an,d that witllin at I } ubose
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O So ellat in the Spac: of t 3 Hours the fortarer Isad falI>< I7 Degreess tIze lattcr but 2. Fol tl2e Otwc1 Particu!a§ relatrnO to t!<e Barometert \ATilld, a1zd 5a/earlscr} I reier to tizz Table.
wNs t1)e Baronlctet 11ad been for a good xvhilc pa{t ';lbjCA to fuddc conildc1*alule Variatiotls, I fuEpeEted tllC fC'7Cl'e Cold on AYrdnefiday Nigllt atld E/urfi2vy ^\lelrin:, velold llot continue lon¢: AccoidilrglyX UpOII Illy obScrvislO [11e TEasrlnotneter without at 4 in tl-le lMornittg, I foulld it at 9 nine Degtccs bcloxar the i-rCCZillg PoAlt, tllat writlwin at s five Degrecs atios?e frcezing Poitlt. But at 8 oj t;ue Clock tlle fa*;rc AR01ning, I found the Thermomerer swithc)ut at o tllref Degrees and a llalf above freezin>, and filat xvithin at 4 Vegrees above; fo that in 4 Hours eixze that ntitizout had riten thirteen Degrees and a llalf, alld tllat withixl had fallen I Vegree. Tluis natural jy Icd me tO examine what Signs there might lJe of a Thaw begun, but could finel nolle, in the Sllow svhicll xvas ffi Inclles deep) or in the Po} on tllc \57indoxvs, bllt within an Hour it was vifible enough, alld before IO the Houfes dropt. I would obferve to you, that tlle Wind at 8 in the Morning llad varied very little, if any, from what it xvas the :Nlight before, qoiz. from the Ea0 but foon after it bore tc) Soutll-Eaft and Soutlz.
lMay not this Hudden Change of tlle Tempel of tlae Air be attributed it to a fabterraneall HeatV And may not the {hifting of the AVilld be caufed, in a oreat mcafure, by tlle fame >
If atou tlaink tlleSe Olofervations may bc accepta- ble to the Gentlenzell of the Royal Socety) xvho keep
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[ 6t5 ] a Regiller of tlle Weathcr, and may ferve to per- fuade thor:> WllO have not yct tricd it, to hang tlleir Tllermometers abroad, you have Leave to com lnUniCatC it from their and
Ecoting, Dec. 8. Zotwr moJ? obedient Servant, I 747*
Henry Miles
L 111. EXays
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- - -
s - o * s S
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Decenaber I747.
_ _ _e
At 8 Morn. BTind ]li71l at S. V\7. Intlcll ltain precedil1ta, STight. Sllowery afterwald in tlle Mornin;, an1 \N?illd exceeding high. Sleetat X I p. nz calmerand clearerioon after, Btind N. W. and I\7. began to freeze in tlle Esrell- int,, clea1* at 9 2 pe m. when tlle Evenin; Account was rC don.
At 8 Motn. clou(ly tllick ltir, 11art1 lFroR; Xt 4. fltne Morne very clear, anci GlaSes were at 29 5 o and "- and 49 +\lillt,
Eaft, cloudy all Day, at 4 p. un. Snow fell, and was deep before 8. Evening Account taken at 9 t p. so.
At 8 Morn. clotldy, Willel at near Eak; I)lows bricls at 4 tlle fame Morn. Gla(Ees were 29 6 1 -9- az(1 ' Rain be- fore I I EYtNillg .4CCOLIIlt Xt 9-. sa.
,4
Explication.
I DayBarolll Morn 28 Inclles t^2- 1 e-o
Ditto. Therm. Morn. 1 7 iS I' Dcgtets al)ove fiocezillgiPoint tlle upper lStumbe1* is for tlle l'l^rnn Mit]zO*lt lDoOrs, tlt
lowcr for tlaat in nry ltoonz a¢)(l iQ fs)r tild re0. r ___ _F <___ .. 4 . * _.o
1 Morning Days' Baronl. Il'her. ..
1 2S 6 3 I7
O
I4
O
29 5 5 x
r r Evening I Barom. Ther.
29 q O O
29 4o
.. .
29 4 9
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4 o _
I2
o
9 -
o
* 3-
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2
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I o- .)
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o
9 C)
2
29 5 6
r 7
3
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