257 
fell in the other. In two of the years (1865 and 1866), this 
excess amounted to more than 5 inches,—indeed in 1865 to more 
than 54 inches : in two other years (1870 and 1871) it amounted 
to more than 4 inches : in two other years (1869 and 1874) to 24 
inches, less in one and more in the other: in the remaining four 
years the excess varied from 1} inches or more to rather above 
half an inch, one of the instances of a very small excess occurring 
in 1872, the wettest year in the whole decade when much rain 
fell in every month. 
But when we inquire in which of the two months, September 
or October, this excess of rain usually takes place,—we find it 
equally divided between the two; there being in the decade 
exactly five years in which September had the excess, and five in 
which October had it. The conclusion seems to be that, on an 
average, one of the two months of September and October is 
comparatively speaking a wet one, and the other a dry one. But 
which is to be wet and which dry is an even chance looking 
merely to returns. 
TABLE II. Vo. of Rainy Days, or on which not less rain fell than 0.01% 
inc., in cach month in cach year of the Decade, commencing with March, 1865, 
and terminating with February, 1875. 
Jan. | Feb. | Mar. |April. | May. | June. | July. | Aug. | Sept.| Oct. | Nov. | Dec. aid 
—_|——— 
16 14 18 20 Io 7 15 8 12 24 5 13 162 
19 10 12 10 8 5 7 16 II 12 10 26 146 
15 18 12 9 20 9 9 7 19 12 15 17 162 
15 13 8 2 8 2 7 5 10 19 12 12 113 
17 15 10 18 4 13 21 6 13 13 7 13 150 
25 22 13 9 17 18 10 15 19 19 20 23 210 
19 12 15 7 II 8 15 19 12 15 14 8 155 
Wy 14 13 13 8 7 Io 16 20 17 II 11 157 
22 Io — = a _ — LLM == = —3 os 32 
19 | 14.8 | 12.7;) r1.2 | ux.x | 80 | 11.3 | 22.8 | 14.7] 16.1] 13.2] 15-3 | 160.9 
