129 
In the next table are given the results obtained from rain 
gauges of two different kinds, placed in close proximity in 
the same plane, and 3ft. from the ground, the one has a lOin. 
round receiver, and the other a 5 in. square receiver. Nearly 
all the months on which there was an excess of rainfall the 
smaller gauge registered the larger amount; out of the four 
months when the rainfall was below the average three of 
them show the greater fall in the greater gauge. Nearly 
the whole difference between the fall in the two gauges 
occured in January. A similar circumstance happened in 
the December of the previous year, that is in the preceding 
month, and both cases were doubtless due to the same cause, 
namely the fall of snow. An average fall in both gauges 
over a period of eight years shows a difference of only rloTr 
of an inch. Thus as I have said before the two gauges are 
practically checks upon each other. 
1875. 
Rainfall in 
inches in 
lOin. round 
receiver 3ft 
from 
ground. 
Rainfall in 
inches in 
5in. square 
receiver 
3ft. from 
ground. 
Difference. 
From 1868 to 1875. 
Difference. 
Average of 
8 years 
rainfall in 
inches in 
lOin. round 
receiver 
3ft. from 
ground. 
Average of 
8 years 
rainfall in 
inches in 
Sin. square 
receiver 
3ft. from 
ground. 
January 
February 
March 
April 
May 
June 
July-... 
August „ 
September 
October 
November 
December 
3-469 
0-833 
0-779 
0- 763 
2- 676 
3- 897 
5-624 
4- 067 
5- 489 
5-030 
4-099 
1- 166 
4'062 
0-824 
0-724 
0- 779 
2- 690 
3- 956 
5-710 
4- 056 
5- 497 
4-960 
4-118 
1- 131 
—•593 
+•009 
+•055 
—•016 
—•014 
—•059 
—•086 
+•011 
—•008 
+•070 
—•019 
+•035 
3-082 
1- 974 
2- 203 
1- 853 
2- 008 
2- 548 
3- 148 
3- 372 
4- 069 
4-983 
3-272 
3-023 
3‘142 
1- 940 
2- 227 
1-827 
1- 978 
2- 522 
3- 143 
3- 351 
4- 030 
4-967 
3-306 
3-073 
—•060 
+•034 
—•024 
+•026 
+•030 
+•026 
+•005 
+•021 
+•039 
+•016 
—•034 
—•050 
37-892 
38-507 
—•615 
35-535 
35-506 
+•029 
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 
Sin. square receiver, and the one is placed 3ft. and the other 
34ft. above the ground. The total fall in the one 3ft. from 
