Results of a Meteorological Journal for 1821. 
ANNUAL RESULTS FOR 1821. 
Barometer. 
Greatest pressure of the atmosphere, Feb. 6th. Wind S. 
Least do. of do. - Dec. 24th. Do: S.E. 
Range of the mercury ar oe ee ee 
Annual mean pressure of the atmosphere .. 
Mean pressure for 170 days with the Moon in North 
declination : oe 
Mean pressure for 183 days with the Moon in South 
declination ni oe es oe 
Annual mean pressure at 8 ) *dlock A ae oe 
————- at 20’clock P.M. .. ee 
rs — at So'clock P.M. .. ee 
Greatest range of the mercury, in December ve 
Least range of do. in August 
Greatest annual variation in 24 hours, in Devethber 
Least of the greatest variations in 24 hours, in July 
Spaces described by the alternate rising and falling of 
the mercury ve es 
Number of changes caused by the variations in the 
weight of atmospheric column .. ee oe 
Seif-registering Day and Night Thermometer. 
273 
Inches. 
30°88 
28°10 
2:78 
29°823 
29-905 
29°784 
29-818 
29-824 
29-826 
2-200 
0-670 
1-170 
0380 
80°510 
276. 
Greatest thermometrical heat, August 23d. Wind S.E. 80° 
Range of the thermometer between the extremes , 
Annual mean temperature of the atmosphere ae 
of do. at 8 A.M. 
of do. at 8 P.M. ° 
of do. at 2 P.M. 
Greatest range in April : as a oe 
Least of the monthly ranges in December’ .. > os t 
Annual mean range .. ee oe 
Greatest annual vafiation in 24 hours i in July ee 
Least of the greatest variations in 24 hours in January 
aud December or ef oo! 
Mean temperature of spring water at 8 A.M. ee 
De Lue’s Whalebone Hygrometer, 
Greatest humidity of the atmosphere, 32 times ee 
Greatest dryness of the atmosphere on the 29th of June 
Range of the hygrometer between the extremes oe 
Annual mean of do. at 8 A.M. a °° oe 
——— at 8 P.M. «se oe oe 
at 2 lr M. oe ee 
——— at 8, 2, and 80 flock . ¢e 
Vol. 59, No. 288. April 1822, Mi m 
cold, January 2d. Wind E,. 
24 
56 
52°56 
pv 
51-01 
57°61 
41:00 
22:00 
51:08 
26:00 
17:00 
51:60 
Degrees. 
100 
34 
66 
73°4 
75°3 
63°5 
708 
Greatest 
