- 
Pa : 
Meteorological Observations at Hudson, Ohio. = 3:11 
give the monthly averages of the observations, with such — 
ulars as are thought most worthy of notice. 
_ BAROMETER. 
1839. i gabe 
sEloa] 83 eel esl g] S8leel Fle 
: £3)25) 33 28) s3\ss|.22\26) 23 
MONTHS. gE ze ge ge eo Pelee €? 
es = 6° Se) Peis so) slo e] SSk 
Pewee “6/ a5 Pa] 25\22| 28 
March, A. M. 28.8 28.820) i i: ‘6? 
Y od PYM. -T66}* i 
April, 9 a.m. -738) 
¥ P.M. 
May, 9a.™. 
see P. M. 
a June, 9a. M. 
ee, P.M, 
July, A. M. 
Ce ee Pi Mh bey 
Aug., A. M. 
Rie Pt 
Sept, Fa. ul 
P.M. 
Oct., A.M} > 
bh as 4 ake ee 
Nov., © pos: - 
‘ PB. Me 
Dec., ve ae 
oe P.M} 
se P08 
P. M.p> 
»Feb., A.M 
P.M. 
aay 
‘The mean duane ‘oxtilinkiote i is fd the be jidgtaoed 
months 0.0405; autumn and winter months, 0.0463. Differ- 
ence 0.005 It is least of all in summer, and nee 
autumn. Average for the year, 0.0434. Prof. Forbes’s for 
z=.1193 cos.20—.0150, 2 being the oscillation in lasitnder 6, 
gives 8 Bisidson sha sabia) The accordance is certainly re- 
tmarkab 
Bite im mean of all the ipiovl pittensiork: gives for the win 
months 28,751; summer 28.810; autumn 28.853; winter 28.809; 
the mean pressure being .102 greater in autumn than spring. So 
large a difference derived from three years’ observations might be 
tegarded as indicating a law of nature. According to observa- 
tions of fourteen years at London, the mean pressure was least 
in Spring and greatest in winter, the difference amounting to 
038. Ihave sought for information on this subject from other 
tic observations made in this country, but they are 
almost without exception uncorrected for effect of temperature, 
hor are any data. furnished for computing it} and even if the 
temperature of the mercury were given, the barometers are 
seldom CG uotajen cout upon, ee Arenal observations. 
