132 Meteorological Journal. 
circuit ; and quite to the east, while it swept the other half. Most, 
if not all, of the elements of this generalization have been be- 
fore obtained by such distinguished experimenters as Faraday, 
Henry, Becquerel, Pixii, and others, yet I have not seen it stated 
in a form so convenient to those who are already acquainted with 
electro-magnetism, and are just commencing the converse subject 
of magneto-electricity. 
Arr. X1— Abstract of a inc Ae Journal, for the year 
1837, kept at Marietta, (Ohio,) in Lat. 39° 25’ N. and 
Lon, 4° 28’ W. of Washington City ; by 8. P. Hitprertn. 
THERMOMETER. + s BAROMETER, 
ae S8 
: $3 
Months. = ~ oe ES Po = Prevailing winds. : : 
ot $B 16hg| |g )Si ce gf | ode 
see PR Olds Bla ‘ q 
Sere PP palhel Fe gia) 2)? 
% euge . et E Land 62 =|. x , = = = - 
January, |28.00/54) 6 23) - [4 W., 8. W.& N 20 39.65 28. “ 
ruary, |34. 4 13) 1/80\w., s. w. & N. Now. 25) 4, 
ch. 41. 12 12; 3 N. W. & 8. E. rag 15) a 
April, 45.33 86/24 |62) 20) 10 1 N.N.W. & W. 15/29. : 
60.50 92) 4) 4: 8 8.:,S.E.& N. 30/29. J 
June, 66.83 88.45 |43) 4 7/84 8., W. & N. .20) 29. P 
July, 71.17.89/54 |35| 27] 4| 5|13) w., N.& 8. w. 32/29. ! 
g 69.708848 40} 21] 10 4/84 s,s. w. &N. 40 29.60: 4 
September, |62.7185 41 |44/ I1} 4/23, 8., B. & N. .50)29.73)3 A 
ctober, | |54.44.8020 |60, 22} 9) 4/25 N. & 8. 49 29.73 4 
November, |48.51,71 19 |52) 21} 9) 3/30) ., 8. & 8, w. 9.33 29.88|28.78|. 
December, 35.5771 13 (58 Ib 3 80) W. & 8. W. -30 29.70)2 90 
Mean, = {51.57 Ri 141 43/36! Mean range, 39.31) 
Observations on the year 1837.—The mean temperature of the 
past year has been a degree and a half greater than that of the 
year 1836; which, although small in amount, has nevertheless 
had a decided influence on the season. The heat has also been 
more equally distributed through the year, and not subject to 
any great vicissitudes. In winter the temperature has at no time 
been at zero; and in summer it has not risen above ninety de-— 
grees of Pabronheit. 
The average heat for the different seasons of the year has been 
as follows, viz. 
