Pressure of the Wind. 
285 
TABLE XXII. — Extremes of the Mean Daily Pressures of Dry Air, with their Ranges and Means. 
Month. 
Highest. 
Lowest. 
Range. 
Mean. 
Monthly Mean 
minus Mean. 1 
d. 
in. 
d. 
in. 
in. 
in. 
in. ' 
January 
19 
29-875 
13 
27-820 
2-055 
98.847 
i n 907 
+ 
February 
11 
29-830 
3 
28-748 
1082 
29-289 
+ 0 030 
March 
8 
29-962 
31 
28-764 
1-198 
29-364 
+ 0-079 
April 
11 
29-612 
1 
28-704 
0-908 
29-158 
+ 0079 
May 
1 
29-920 
27 
28-813 
1107 
29-366 
-0-027 
June 
12 
29-687 
9 
28-504 
1-183 
29-095 
+ 0-205 
July 
11 
29-648 
29 
28-838 
0-810 
29-243 
+ 0-005 
August 
30 
29-611 
3 
28-716 
0-895 
29163 
+ 0 082 
September 
23 
29-943 
30 
29-082 
0-861 
29-512 
+ 0-042 
October 
19 
29-928 
28 
28-322 
1-606 
29-125 
+ 0-031 
November 
14 
29-883 
22 
28-724 
1-159 
29-303 
-0-067 
December 
18 
29-902 
5 
29-277 
0-625 
29-589 
+ 0-096 
This Table has been formed from Table XX. 
in. 
The highest mean daily pressure of dry air occurred March 8 d = 29-962 ~i 0 ooo'oi 
The lowest Jan. 13 d = 27-820 ) Kange = 2 * 142 ' Mean = 28-891 • 
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. 
in. 
The greatest monthly range of the daily means occurred January 13 — 19 = 2-055. 
The least 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. 
Civil 
Day. 
Jan. 
Feb. 
March. 
April. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
lb. 
1 
[ ] 
4-24 
0-52 
1-04 
0-30 
0-40 
1-56 
1-20 
0-11 
[0-69] 
0-02 
0-07 
2 
0-50 
3-96 
0-54 
[0-81] 
0-28 
0-50 
[1-14] 
0-92 
0-28 
1-27 
0-01 
0-47 
3 
0-50 
3-42 
0-23 
0-62 
0-17 
1-18 
3-20 
0-42 
[0-22] 
0-34 
006 
[1-72] 
4 
2-20 
5-97 
0-18 
0-52 
0-35 
[0-64] 
0-59 
0-03 
0-64 
0-67 
1-31 
1-32 
5 
2-00 
[2-67] 
[0-23] 
0-73 
2-47 
1-04 
0-26 
1-35 
0-15 
0-37 
[1-08] 
3-96 
6 
1-00 
1-29 
0-15 
0-64 
0-67 
0-31 
0-99 
[0-44] 
0-12 
1-48 
1-80 
3-90 
7 
3-50 
0-98 
0-27 
0-74 
[0-92] 
0-39 
0-22 
0-39 
016 
1-35 
1-66 
2-96 
8 
[2-18] 
0-42 
000 
0-85 
0-72 
2-57 
0-14 
0-42 
0-02 
[0-57] 
1-67 
1-48 
9 
206 
210 
019 
[1-05] 
0-89 
1-70 
[0-46] 
0-02 
012 
011 
0-40 
010 
10 
3-52 
1-80 
0-05 
0-90 
0-45 
1-62 
0-42 
0-06 
[0-12] 
001 
0-06 
[1-27] 
11 
0-99 
0-74 
0-20 
1-22 
0-25 
[1-27] 
0-35 
019 
0-12 
,0-09 
0-22 
0-41 
12 
000 
[1-06] 
[0-41] 
1-94 
013 
0-43 
0-62 
0-26 
0-12 
3-42 
[0-37] 
0-35 
13 
1-88 
0-17 
1-37 
1-27 
0-99 
0-57 
0-23 
[0-18] 
016 
1-40 
0-15 
2-31 
14 
2-72 
1-43 
0-35 
2-41 
[0-88] 
0-71 
0-47 
0-28 
014 
0-41 
0-32 
3-18 
15 
[1-45] 
012 
0-31 
102 
0-78 
0-47 
122 
0-25 
0-32 
[1-19] 
1-09 
3-23 
16 
1-22 
0-05 
0-47 
[1-02] 
1-57 
0-32 
[0-58] 
0-07 
0-57 
0-12 
0-25 
0-40 
MAG. AND MET. OBS. 1843. 
