164 ABSTRACTS FOR Humipity, WIND, AND CLouDs. 
TABLE XIII.—Mean Relative Humidity for periods of Three Months, for the Summer and Winter Months 
1842, and for the Year 1842. 
Periods. 
1841. 
July, Aug., Sept. 
October, November 
1842. 
Jan., Feb., March 
April, May, June 
July, Aug., Sept. 
Oct., Nov., Dee. 
Jan., Feb., March, } 
Oct., Nov., Dec. 
April, May, June, 
July, Aug., Sept. \ 
The Year. 
Mean of the 
Four Hours. 
0-800 
870 
+835 
“717 
“767 
+823 
+829 
“742 
785 
The humidity is least about 2" in winter, and between 9» and 5" in summer ; and is less in summer than in winter. 
TABLE XIV.—Force of Wind at the Observation Hours, and Maximum Force between the Observation Hours. 
Month. 
May 
June 
July 
August 
September 
October 
November 
December 
Means 
54 and 201, 
Ibs. 
20% and 234, | 23% and 2h, | 2h and 5b, 
Ibs. Ibs. lbs. 
The force of wind was estimated from May till the 21st of October, afterwards the pressures are from the 
Anemometer. The quantities from the Anemometer are Ibs. pressure on the square foot of surface; the estima- 
tions have nearly the same value. 
A maximum seems to occur about 2. 
TABLE XV.—Mean quantity of Clouds from May till December 1842 at the Observation Hours. 
Month. 
May 
June 
July 
August 
September 
October 
November 
December 
Means 
20h, 
Mean of the 
2h ot || Four Hours. 
6-6 6:5 6:8 
5:5 66 6-1 
8-1 6-7 77 
7:3 7:3 7-5 
8-4 71 8-1 
6-2 7:3 6:3 
7-8 8-5 8-0 
7-0 7-5 7:3 
7-1 7:2 7-2 
A maximum in the quantity of clouds seems to occur about 23" in the months of June, July, August, and 
September, and a minimum about the same hour in the other months. 
hours are almost exactly those for the month of December. 
The means for the 8 months at all the 
