by two Thermometers at different Altitudes. 53 
Dif. be- 
tween. 
Date of] Period of |Pos. off Temp. 
Obser. Day. |Therm) indicated. 
1821. | w. m. 
Noy.16] 9 P.y 
Weather. 
= 
Floor | 640 F. 2 
62 feet) 66°65 
Floor | 60 
64 feet} 62:5 
6 30 ep. m./Floor | 62 
64 feet} 65°5 
2:5 F. |Clear star-light sky 
= 
i eee 2-5 |Bright unclouded sky 
oo Some rain 
9 
10 20 r. m. plead = 5 Constant heavy rain 
18/10 20 a. ».|/Floor | 61:5 f : 
GE feet| 64 2:5 ‘|Fine day 
19/10 a. M.|Floor | 59 4 Rai 
62 feet| 63 sl 
6 p.M.|Floor | 58 
63 feet | 62 
9 p. M.|Floor | 61 
64 feet} 63°5 
20/10 a. M.|Floor | 58 
64 feet] 60 
21/10 a.M.|Floor | 60 
63 feet| 62:5 
8 p. M.|Floor | 58 
63 feet] 63°5 
4 Rain 
25 {Clear sky 
2:5 |Fine day 
2:5‘ |Fine day 
5°5 Continued rain during the 
22) 9 30 a. m./Floor | 57 As __ [night 
62 feet] 59°5 2:5 Cloudy, but dry 
resin + ede es 4 Rain during the night 
6E feet| 64 
23) 9 20 a. .jFloor | 59:5 
6% feet| 62 
6 p.m Floor | 59-5 
64 feet} 62 
2419 p.M.|/Floor | 57 
64 feet) 59:5 
2:5 |Cloudy, but dry 
25 Fine evening 
PM BO BO BOD BO BD AD Bm ON we mw Ow 
25 Good day 
I have only to regret occasional omissions, and that my avoca~ 
tions did not permit me te attend to more regular intervals of 
time.—The question appears to me to be a curious one, and to 
solicit further and more delicate attention. The correspondence 
is remarkable, though it will doubtless be violated by circum- 
stances, which in the present state of our meteorological science 
cannot perhaps be always or altogether estimated. 
I have the honour to be, sir, 
Your most obedient and very humble servant, 
J. Murray, 
Surry Institution, January 11, 1822. 
XIV. No- 
