68 
Ordinary Meeting, November 16th, 1858. 
W. Fairbairn, F.R.S., &c., President, in the Chair. 
A Paper was read by Mr. M. Curtis, being “ An account 
of the fall of Rain at Manchester from the year 1786 to 1857 
inclusive.” By Mr. John Curtis. 
This Paper was founded on observations made by Mr. G. 
Walker, Dr. Dalton, Mr. Casartelli, and himself, and was 
accompanied by Tables showing the amount of Rain 
collected at Manchester in each month and year, from 
1786 to 1857 inclusive, and also the monthly and yearly 
mean average of the whole. 
Mr. Curtis stated that, as Dr. Dalton found Mr. Walker’s 
average to exceed his by about 4 inches in the year, he 
waited upon him and inspected his gauge, and found his 
mode of measuring the rain was not susceptible of sufficient 
accuracy, and on suggesting the same to Mr. Walker, he 
seemed to acquiesce. For this reason he gave the average 
of the 72 years, including Mr. Walker’s in one table and for 
64 years excluding Mr. Walker’s in another. 
As the situation of the rain-gauge employed and the influ- 
ence of surrounding objects thereon will produce different 
results, he prepared the following table to show the mean 
monthly and yearly fall of rain as registered by each observer 
of the whole period, and of the 64 years ; which latter period 
is what he recommended, being adopted as nearest correct. 
Walker, 
Dalton, 
Casartelli, 
1 Curtis, 
1 Total, 
1 1 
8 years, 
47 years, 14 years, 3 years, 7‘2 years. 
64 years. 
1786 to 179G 
1794 to 1840 1811 to 1854 1855 to 1857 1786 to 1857 1794 to 1857; 
inclusive. 
inclusive. 
inclusive. 
inclusive. 
inclusive. 
inclusive. | 
Inches. 
Inches. 
Inches. 
Inches. 
Inches. 
Inches. 1 
January ... 
2-4085 
2-257 
3-335 
2- 1 50 
2-4890 
2-4015 I 
February ... 
2-7499 
2-443 
2-437 
1-946 
2-4556 
2-4190 
March 
21145 
2-308 
2-261 
1-526 
2-2427 
2-2588 
April 
2-3010 
2-114 
1-697 
2-123 
2-0536 
2.0225 
May 
3-6103 
2-446 
2-134 
2-376 
2-5008 
2-3746 
June 
3-3000 
2-691 
3-319 
3-106 
2-8985 
2-8483 
July 
4-5832 
3-706 
3-703 
3-663 
3-8187 
3-7231 
August 
4-7499 
3-463 
3-767 
4-356 
3-7025 
3-5715 
September.. 
4-2144 
3-102 
3-103 
2-356 
3-2552 
3-1353 
October ... 
4-5104 
3-754 
4-262 
3-223 
3-9150 
3-8404 
November... 
3-3010 
3-712 
3-416 
2-020 
3-5386 
3-5682 
December... 
5-2873 
3-437 
3-148 
2-012 
3-5286 
3-3088 
Total 
43-0022 
35-523 
36-672 
30-857 
36-3088 
35-56-20 
1st (i months 
10-4451 
14-250 
15-183 
1 3-227 
14.640-2 
14-4147 
2nd (5 months 
26 6471 
21-264 
21-489 
17-630 
21-7586 
21-1473 
Proceedings No. 4.— Session 1858-9. 
