/ 
225 
PHYSICAL AND MATHEMATICAL SECTION.' 
January 7, 1864. 
J. Baxendell, F.R.A.S., President of the Section, in the 
Chair. 
Two Papers were read by Mr. Vernon. (These were 
afterwards read at the ordinary meeting of the Society, 
January 12 . See page 216.) 
The following returns of the Rain Fall for 1863, were com- 
municated to the Section. 
Old Trafford, Manchester. 
By a . V. Vernon, F.R.A.S., M.B.M.S. 
Rain G-auge three feet above the ground, receiving surface 106 feet above 
the mean level of the sea. 
Quarterly 
periods. 
1863. 
Fall in 
inches. 
Average 
of 70 Yrs. 
Differ. 
Number 
of Days 
on which 
Rain fell 
in 1863. 
Quarterly 
1863. 
Periods. 
1862. 
1862. 
Days. 
1863. 
Days. 
Inches, 
Inches. 
Inches. 
Inches. 
( 
January... 
4'425 
2-471 
+ 1-954 
17 
45 
45 < 
February . 
0-941 
2-356 
— 1-415 
16 
[ 6-170 
6523 
l 
March . . . 
0-804 
2-314 
— 1-510 
12 
3 
c 
April 
1-391 
2-044 
— 0-653 
17 
■) 
61 
53 ] 
May 
1-724 
2-345 
— 0621 
14 
[ 7-746 
10-259 
l 
June 
4-631 
2-913 
+ 1-718 
22 
3 
c 
July 
1-630 
3-619 
— 1-989 
7 
51 
56 \ 
August ... 
5-027 
3-610 
+ 1-417 
25 
P 12-216 
11*875 
l 
September 
5-559 
3-225 
+ 2-334 
24 
3 
C 
October . . . 
6-242 
3’845 
+ 2-397 
22 
) 
61 
61 ) 
November 
2-902 
3-477 
— 0'575 
18 
[ 12-208 
9-941 
l 
December. 
3-064 
3-279 
— 0-215 
21 
3 
218 
215 
Total 
3S-340 
35-498 
+ 2-842 
215 
38-340 
38.598 
The rain fall during the past year, as will be seen above, 
has been 2*842 inches above the average of the last TO years, 
and almost identical with the rain fall of 1862, the difference 
being only 0*258 inch. In 1862 rain fell on three more days, 
or on 218. 
