oO 
PRESSURE OF THE WIND. 28 
TABLE XXII.—Extremes of the Mean Daily Pressures of Dry Air, with their Ranges and Means. 
Monthly Mean 
Highest. Lowest. Ri b 
6 ares minus Mean. 
fC in. f in. in. in. in. 
January | 29-875 27-820 2-055 28-847 + 0-297 
February 29-830 28-748 1-082 29-289 +0-030 
March 29-962 28-764 1-198 29-364 +0-079 
April 29-612 28-704 0-908 29-158 + 0-079 
May 29-920 28-813 1-107 29-366 — 0-027 
June 29-687 28-504 1-183 29-095 + 0-205 
July 29-648 28-838 0-810 29-243 + 0-005 
August d 29-611 28-716 0-895 29-163 || +0-082 
September | 29-943 29-082 0-861 29-512 + 0-042 
October | 29-928 28-322 1-606 29-125 +0-031 
November 29-883 28-724 1-159 29-303 — 0-067 
December 29-902 29-277 0-625 29-589 + 0-096 
This Table has been formed from Table XX, 
The highest mean daily pressure of dry air occurred March 8¢ = 29: 962 date eee 
Bbietlonyest the Teed) Demmeitans. ttaliase te saute « Jan. 134 = 27:820 } feee Gin eta ee 
This mean is 0°433 in. less than the mean for the year. 
The mean of the 12 monthly maxima and minima of the daily means is 0-071 in. less than the mean for 
the year. 
The greatest monthly range of the daily means occurred January 13—19 = 2-055. 
Mite Teast erisetbeeneaecee snclensiie tet sacha anette s\- ....-. December = 0°625. 
The ranges and means give nearly the same results as have been obtained for the total atmospheric pressure. 
TABLE XXIII.—Daily, Weekly, and Monthly Means of the Pressure of Wind in Pounds on the 
Square Foot of Surface, deduced from the greatest Pressures occurring between the Two Hourly 
Observations. 
Nov. 
lb. lb. 
[0-69] | 0-02 
1-27 | 0-01 
0:34 | 0-06 
0-67 | 1-31 
0:37 | [1-08] 
1-48 | 1-80 
1:35 | 1-66 
[0-57] | 1-67 
0-11 | 0-40 
0-01 | 0-06 
0-09 | 0-22 
3-42 | [0-37] 
1:40 | 0-15 
0-41 | 0-32 
[1-19] | 1-09 
0:12 | 0-25 
MAG. AND MET. oBs. 1843. 
