14 
From the numbers in this table we learn that the coldest month in 
the year has taken place in January 26 times, in February 8 times,! 
December 8 times, in March once, and in November once. These un- 
usual circumstances took place in the years 1837 and 1851 respectively. | 
The hottest month has occurred twice in June, 27 times in July, 
and 15 times in August. 
The month of lowest temperature was January 1838 ; and of highest 
was July 1852. 
By taking the mean of all the values for each month, we find : — 
The mean temperature of January 
was 37 A 
„ „ February 
„ 39A 
,, ,, March 
„ 42-4 
„ „ April 
„ 48-2 
' May 
„ 54-4 
„ „ June 
„ 60-5 
July 
„ 63-1 
,, „ August 
„ 622 
,, ,, September 
„ 57-6 
„ „ October 
„ 50-4 
„ r „ November 
42-7 
,, December 
„ 40-0 
And the mean of these gives 49°‘9 as the mean yearly temperature. 
By taking the means of the numbers in each horizontal line, the 
mean temperature for each year is determined as follows :— 
TABLE. XV .—Mean Temperature of every Year , 1826-1869. 
Years 
Mean 
Temperatures 
I 
Years 
Mean I 
Temperatures f 
Years 
Mean 
Temperatures 
1826 
0 
51-4 
1841 
0 
49-8 
1 856 
0 
49-2 
1827 
510 
1842 
50-5 
- 1857 
O.i-o 
1828 
52-2 
j 1843 
50-3 
1858 
49-4 
1829 
47'9 
1844 
49-4 
1859 
50‘5 
OO 
O 
498 
j ^45 
48-0 
i860 
47-1 
1831 
521 
1846 
51-7 
1861 
49-2 
C* 
CO 
OO 
50-1 
1847 
49-7 
| 1862 
j 
50-0 
1333 
50-4 
1848 
50-1 
1863 
50-9 
1834 
52-2 
1849 
501 
1864 
48'6 
1835 
506 
1850 
48-9 
1865 
50-2 
1836 
49-5 
1851 
49-7 
1866 
50-4 
1837 
48-8 
1852 
50-9 
1867 
49-2 
1838 
47-8 
>853 
48-1 
1868 
52 3 _ 
i8 39 
49-8 
1854 
49-2 
1 8 69 
50-0 
1840 j 
48-9 
1 8 5 5 
47-2 
j 
