314 
MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS 
Table IV. (Continued.) 
Year. 
January, 
February, 
March. 
Group 
of years. 
April, 
May, 
June. 
Group 
of years. 
July, 
August, 
September. 
Group 
of years. 
October, 
November, 
1 December. 
Group 
of years. 
For the 
year. 
Group 
of years. 
1817. 
42-5 
O 
O 
51-3 
° 
57-3 
° 
44-°3 
- 
° 
48-9 
O 
1818. 
40-0 
54-7 
64-6 
48-5 
51-9 
1819. 
42-7 
54-0 
62-3 
43-1 
50-5 
1820. 
38-0 
53-6 
58-6 
44-1 
48-5 
1821. 
1822. 
40-1 
44-8 
>40-6 
55- 6 
56- 1 
>53-8 
60-8 
61-1 
>61-4 
48-7 
46-9 
>45-9 
50-5 
52-2 
>50-3 
1823. 
37-9 
52-0 
59-2 
44-8 
48-7 
1824. 
39-0 
50*5 
61-2 
47-2 
49'5 
1825. 
39-7 
54-8 
63-4 
45-5 
50-8 
1826. 
40-1 
J 
55-0 
62-9 
J 
46-0 
5M 
1827. 
37-4 
53-4 
60-9 
47-1 
49-7 
1828. 
42-5 
54-6 
60-6 
47-6 
51-3 
1829. 
37-7 
53-4 
58-1 
I 41-9 
47-8 
1830. 
38-3 
53*8 
59-3 
1 44-7 
49-0 
1831. 
1832. 
41-2 
39-6 
>40-2 
54-4 
53-7 
154-2 j 
62-4 
60-7 ■ 
>60-1 
48-4 
47-1 
>45-8 
51-6 
50-3 
^50-1 
1833. 
39-5 
58-5 
54-5 
46-8 
50-0 
1834. 
44-2 
53-7 
62-7 
46-5 
51-8 
1835. 
41-6 
54-1 
62-7 
43-3 
50-4 
1836. 
40-6 
J 
52-7 
/ 
59-5 
44-1 
- 
49-3 
J 
1837. 
39-1 
49-4 
59-9 ■ 
45-6 
48*5 
1838. 
35-8 
50-8 
59-3 
45-3 
47-8 
1839. 
1840. 
.39-8 
39-6 
>39-4 
50-9 
52-9 
^52-2 
59-4 
56-1 
>59-4 
45-7 
42-5 
>45-1 
48-9 
48-6 
>49-2 
1841. 
40-2 
54-2 
59-6 
45-7 
49-8 
i 
1842. 
40-8 
54-4 
1 
61-9 
45-6 
J 
50-7 
J 
1843. 
40-8 
/ 
52-6 
1 1 
The mean temperature from all the observations 
For the quarter ending March . 31 was 39‘8, 
„ June. . 30 was 53*1, 
„ September 30 was 60*5, 
„ December 31 was 44*8, 
and for the year from all the observations was 49°'6. 
By taking the difference between these numbers, and those contained in the pre- 
ceding Table, the next Table is immediately formed. 
