27 
1853 
November 14 to November 28 
equal 
15 
days 
1855 
„ 29 „ December 
14 
97 
16 
1856 
„ 3 „ November 17 
99 
15 
99 
1858 
„ 6 „ 
24 
99 
19 
ff 
1859 
» 8 „ ,, 
22 
» 
15 
99 
1862 
11 „ 
27 
99 
17 
99 
1829 
December 13 „ 1830 Jan. 
6 
99 
25 
99 
1835 
„ 4 „ December 
17 
>5 
14 
9 9 
1837 
i> 1 >> >> 
16 
99 
16 
1840 
„ 3 „ 
30 
9 5 
28 
1841 
„ 30 „ 1842 Jan. 
15 
99 
17 
1853 
„ 14 „ 1854 Jan. 
6 
99 
24 
99 
1859 
„ 10 „ December 
23 
99 
14 
99 
1860 
10 ,, 1861 Jan. 
19 
1 9 
41 
,, 
During the 44 years there were periods of deficiency of temperature 
f a fortnight or more in duration, beginning 
In January there are 
12 times 
In July there are 
8 times 
,, February ,, 
7 „ 
„ August „ 
5 „ 
„ March „ 
5 „ 
,, September „ 
7 „ 
„ April ,, 
8 „ 
„ October ,, 
2 „ 
„ May 
1 „ 
„ November ,, 
10 „ 
„ June „ 
7 „ 
,, December ,, 
8 „ 
i >r 80 instances in all, being 14 less in number than in similar periods 
| f excess of temperature. 
From the above groups we find that the largest periods of excess and 
bficiency above or below the average in each month are as follows:— 
In January, of excess 26 days in 1846; and of deficiency 43 days in 1855 
,, February ,, 
„ 26 „ 
1867 
99 
27 
„ 1858 
March ,, 
„ 28 „ 
1841 
„ 
45 
„ 1837 
„ April ,, 
„ 37 „ 
1844 
20 
„ 1860 
„ May 
„ 25 
1833 and 46 
9 9 
29 
„ I860 
„ June ,, 
„ 24 „ 
1859 
) 9 
75 
„ 1860 
„ July 
„ 27 „ 
1852 
99 
31 
„ 1860 
„ August „ 
„ 24 „ 
1826 
IT 
31 
„ 1860 
,, September ,, 
„ 41 „ 
1831 
99 
22 
„ 1829 
,, October ,, 
„ 24 „ 
1852 
22 
„ 1842 
,, November ,, 
,, 21 
1831 
99 
27 
„ 1844 
,, December ,, 
» 46 „ 
1833 and 52 
99 
41 
„ 1860 
Thus the longest 
period of 
excess above the 
average is 
46 days, 
j ginning in December, in 1833 and 1852 ; and the longest period of 
ficiency below the average is 75 days, beginning in June 1860. 
By taking the algebraical means of the values in each column of 
! tbles XVI. to XXVII., the following Table was formed. 
I By looking over this Table at the general distribution of the -f- and 
signs, the most remarkable fact is the preponderance of + signs in 
3 month of January, towards the end of the series, over those at the 
