71 
The rainfall for 1866 has been 7756 inches above the 
average of the last 73 years, and 1 4*780 inches above the 
fall for 1865. The fall occurred upon 214 days in 1866, as 
compared with 164 days in 1865. 
The principal excess occurred in the three months of 
July, August, and September, the fall in the latter month 
being the greatest fall for September during the entire 
period. In the months of April, May, and June the total 
fall was considerably below the average, June, however, 
taken alone, having an excess, but April had an unusually 
small fall. 
With the exception of October, the rainfall was greatly in 
excess from June to December, and this would tend still 
further to bear out the supposition that October is subject 
to some peculiar abnormal disturbances, as pointed out by 
Mr. Baxendell {Memoirs, 3rd Series, Yol. I., page 263), and 
also by myself {Proceedings, Yol. Y., page 87), in former 
communications. 
During the later months of the year there were excessive 
barometric and thermometric disturbances, as shown by the 
amounts of oscillations. 
The small amount of rainfall in October this year is very 
remarkable, as it is on an average the wettest month of the 
entire year, as 
will be seen 
on comparing 
the annexed 
figures. 
The daily falls exceeding half an inch were 
as follows 
Inches. 
Inches. 
January 21 
0-568 
September 2 .< 
0-500 
May 11 
0-760 
„ 8 .. 
1-150 
June 18 
1-006 
» 11 - 
0-650 
July 3 
0-610 
» 20 
0-550 
July 28 
1-985 
„ 28 
0-770 
August 1 
0-900 
October 24 
0-523 
» 16 
0-670 
November 15 . 
1-240 
„ 29 
1-084 
„ 16. 
0-802 
September 1 
0-760 
December 3 . 
0-580 
