ABSTRACTS FOR THE AQUEOUS VAPOUR. 163 
TABLE XI.—Means of the Pressure of Aqueous Vapour for periods of Three Months, for the Summer and 
Winter Months 1842, and for the Year 1842. 
Period. : 23h, : i Mean of the 
Four Hours. 
1841. 
July, Aug., Sept. 
Oct., Nov. 
1842. 
Jan., Feb., March 
April, May, June 
July, Aug., Sept. 
Oct., Nov., Dec. 
Jan., Feb., March, 
Oct., Nov., Dec. 
April, May, June, 
July, Aug., Sept. 
The Year 
The maximum pressure occurs between 2" and 5%, and it is greater in summer than in winter, 
TABLE XII.—Monthly Means of the Relative Humidity, or of the ratio Eresqure, of Augean’ apes for the 
Pressure at Saturation 
Observation Hours, 20, 23, 2, and 5. 
Mean of the 
Month. . 0 ; ; Four Hours. 
1841. 
July 
August 
September 
October 
November 
1842. 
January 
’ February 
March 
April 
May 
June 
July 
August 
September 
October 
November 
December 
