108 
In the next table I give the results obtained from two 
exactly similar gauges, placed at different heights from the 
ground and free from every interference ; each gauge has a 
5in. square receiver, and the one is placed 8 feet, and the 
other 31 feet above the ground. The total fall for the year 
in the one 3 feet from the ground was 45*217 inches, and in 
the one 34 feet from the ground was 3 6 ‘5 76 inches. The 
difference between the fall in the two gauges is 8*641 inches, 
or about 19 per cent, less rain fell in the higher gauge than 
in the lower. Last year this difference amounted to only 15 
per cent., but the moisture of the atmosphere was greater 
during the past than in the previous year. The table shows 
that in an average of 10 years the difference amounts to 
about 18 per cent. 
1877. 
Rainfall in 
inches in 
5in. square 
receiver 
3ft. from 
the ground 
Rainfall in 
inches in 
5in. square 
receiver 
.‘lift, from 
the ground 
From 1S67 to 1877. 
Average fall 
of rain in 
inches in 5in. 
square receiv’r 
3ft. from the 
ground 
Average fall 
of rain in 
inches in oin. 
square receiv’r 
34ft. from the 
ground 
January 
5-297 
4-049 
3-228 
2-319 
February 
4-212 
3-446 
2-374 
1-836 
March 
2-394 
2-088 
2-388 
1*899 
April 
2-011 
1-663 
1-983 
1-660 
May 
3-095 
2-635 
1-997 
1-789 
June 
1-928 
1-536 
2-525 
2-176 
July 
5*624 
4-562 
3-377 
3-002 
August 
4-950 
4-286 
3-532 
3-004 
September 
2-408 
2‘134 
3-829 
3-309 
October 
4-035 
3-220 
4674 
3-915 
November 
5-447 
4-167 
3-508 
2-782 
December 
3-816 
2-790 
3-342 
2-651 
45-217 
36-576 
36-757 
30-342 
1 
The following table gives the ratios of the excesses of 
O O 
rainfall 3ft. from the ground over the amount measured at 
34ft. from the ground. As I have previously pointed out, 
no regularity exists in the succession of these ratios during 
