General Physics. 141 
The mean temperature of the entire period, was +-0°-68 Reaumur, 
=33°-53 Fahrenheit. 
: Reaumur. Fahrenheit. 
The highest temp. was 32°5 = 105°12, July 7 1818. 
The lowest “© —35°-0 = —46°-75, 4 52" 15 e one 
Range of 18 years, CTO = 101 Ot 
In two instances the thermometer is said to have sunk to — 35°-0, 
once to —33°-8, twice to —31°'5, and twice to —31°-0. The ob- 
servations were all made with a mercurial thermometer, and mercury 
freezes at — 31° Reaumur; that is, according to these observations the 
temperature fell repeatedly below the point of congelation of mercury. 
The following table shows the influence of wind upon temperature. 
ae a north wind, the mean emp was —1°:1 Reaum. 
northwest anes “ “a +1°-0 ” 
se west 6c 13 sc +1°'8 6 
“ southwest ‘* st 3 “ +2°-8 “ce 
id sout ce oc iid “ +2° 6 oe 
oe southeast oe “ oc ce -+-0°'8 “cc 
“cc east cc “se ec it a oe ec 
“ce 6 6c oe Ba 4 oe 
m northeast : 
The og wind is from the northeast, and the warmest from the 
southw 
The “following table shows the number of times the wind was ob- 
served to blow from each of the cardinal points. 
North, . : ; 2350 cee a” “ ; 2760 
Northwest, 2023 | Eas ‘ : 2239 
West...‘ . . : 3007 Rerkbat® ; ‘ 1426 
Southwest, : . 2757 | Calm, . ‘ é 1784 
South, . ‘ ‘ 1969 
The mean direction deduced from these numbers, is 8. 47° 42’ W. ; 
but the mean progress in that direction is less than one twelfth of the 
entire velocity of the wind—so that at Arkangel the wind has no prev- 
alent direction. The atmosphere oscillates to and fro, and the inhabit- 
ants inhale the same particles of air from generation to generation. 
(5.) Ueber das Magnetische Observatorium der Sternwarte bei Miin- 
chen.— Bestimmung der Horisontal Intensitat der Socsamhiiaeedll : 
Resultate der Magnetischen Besboettenger in Miinchen, 1840, . Al, 
1842; von Dr. J. Lamont. 
The first of the above named pamphlets contains a particular ¢ les eri 
tion of the Magnetic Observatory at Munich; the second contains a 
treatise on the absolute determination of the horizontal intensity of the 
earth’s magnetism; and the third contains the results of three years 
magnetic observations. : 
