58 
r 1 , Since then there has been one fall only, of over two inches 
19 tails, sinCv’', ^ ^ 
over one inch. (2-28 iiiches), on Julj ^oth, 1886, and at least 18 others of 
over one inch. Thus there is an expectation that a fall of over 
an inch will occur about five times every four years. In 1880 
there w'ere four months in which over one inch fell. A search 
through the original records might reveal one or two more, as 
the annual tables give only the greatest monthly fall. The 
falls have occurred in all months hut January and April. Four 
come in July, including the 2’28 ; three, ‘each, in September 
and October; two each in March, May, and August. On 
September 28th. 1871, T90 inch fell. 
Humidity.— In this, our tables only run back to May, 1878. 
Hence, only a few words need be said until the original records 
appear. 
The Relative Humidity during the last decade, 1880—91 is 
as follows:— 
Year. 
I. 
II. 
III. 
IV. 
V. 
VI. 
VII. 
VIII 
1—1 
X. 
XL 
XII. 
9 a.m. 
82-8 
90-8 
88-3 
8o-4 
78-6 
73-3 
73-9 
75-0 
78-9 
83-9 
86*0 
89-1 
90*1 
9 p.m. 
86-2 
90-3 
88-4 
87*1 
83-8 
80-4 
81-1 
82-7 
83-7 
87-8 
89*1 
89*2 
91*0 
Mean. 
84-0 
90-7 
88-4 
S6-3 
81-2 
77-1 
77-5 
78-9 
81-3 
85*9 
87-6 
89*2 
90-6 
Taking in the 2§ previous years, the annual mean is 85’0, 
and the separate months vary from the above by — OT (Dee.) 
to + T4 (Feb ). Hence the results are only approximate. 
Again, the 9 a m. annual returns range from 81T (1887) to 84'0 
(’89) in the decade; the 9 pm. from 85*4 (’87), to 87'8 (’86). 
Thus the one varies by 3'9 percent, the other by F9. The 
combined results range from 82‘8 (1887), to 85*4 (’89), or 2 6 
per cent. This would lead us to infer that our mean, 85'0, 
may be within * per cent, of the true value. The excess of the 
Seventies is indicated by the effect of the odd years for which 
we have returns. 
Floods. Floods, again, have only been regularly recorded within the 
up'^reSnt last fcAV years. In 1856, December 7th, a height of 14ft. 3ins. 
was reached, the highest since the 17ft. flood of February, 1831. 
The following list includes all records procurable of floods 
reaching 13ft., or more ;— 
