604 MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS TAKEN AT 
Table XXIX. — Showing the extreme range of the thermometer in every month 
during the time self-registering instruments were in use at the Apartments of the 
Royal Society, and at the Royal Observatory, Greenwich, from 1840. 
At the Apartments of the Royal Society. 
Year. 
Extreme range of readings of the thermometer 
in each month. 
January. 
February. 
March. 
April. 
May. 
June. 
July. 
August. 
September. 
Oclober. 
November. 
December. 
1794. 
29 
0 
21 
0 
22 
35 
0 
31 
0 
33 
30 
0 
30 
0 
31 
0 
28 
2^-5 
28-5 
1795. 
39 
27 
30-5 
25 
45-5 
36-5 
30 
28 
33 
26 
28 
22 
1796. 
20 
26 
33-5 
34 
26 
35 
33 
32 
34 
29 
28 
47 
1797. 
24 
25-5 
26’5 
31 
45 
33 
37 
28 
29 
28 
30 
27 
1798. 
25 
30 
28 
39 
33 
39 
27 
31 
32 
32 
35 
39 
1799. 
30 
38 
28 
32 
34 
34 
29 
26 
30 
28 
26 
33 
1800. 
33 
28 
34 
24 
35 
32 
31 
40 
36 
31 
29 
22 
1801. 
30 
32 
28 
37 
32 
37 
32 
28 
27 
32 
34 
29 
1802. 
33 
27 
38 
35 
45 
38 
26 
32 
35 
42 
23 
21 
1803. 
29 
34 
41 
36 
31 
25 
35 
34 
37 
29 
26 
34 
1804. 
28 
26 
34 
37 
29 
40 
31 
32 
36-5 
30 
25 
32 
1805. 
23 
31 
33 
29 
35 
34 
29 
28 
36 
28 
24 
29 
1806. 
27 
26 
30 
33 
32 
37 
29 
29 
29 
30 
24 
18 
I8O7. 
28 
32 
30 
46 
40 
29 
37 
28 
34 
29 
28 
28 
1808. 
35 
35 
28 
37 
40 
28 
43-5 
29 
32 
28 
25 
34 
I8O9. 
35 
23 
29 
28 
42 
33 
28 
30 
32 
30 
25 
22 
1810. 
37 
36 
31 
38 
33 
33 
27 
30 
35 
38 
1820. 
33 
26 
38 
31 
31 
40 
30 
31 
35 
26 
25 
32 
1821. 
27 
36 
27 
36 
33 
30 
28 
27 
29 
27 
29 
22 
1822. 
20 
20 
31 
29 
30 
34 
23 
30 
25 
25 
23 
31 
1823. 
35 
31 
25 
29-0 
33 
25 
26 
24 
1824. 
27-5 
24 
28 
38-5 
31 
31 
30 
26-5 
44 
34 
31 
23 
1825. 
24 
25 
25 
32 
31-5 
39 
38 
31-0 
30 
35 
29 
25-5 
1826. 
31 
22 
36 
37-7 
26-2 
28-5 
30-2 
25-5 
20-8 
1827. 
32-8 
33*5 
26-4 
40-7 
32 
28-2 
29-3 
31-9 
22-3 
31-3 
32-0 
24-0 
1828. 
26-5 
26-2 
32-2 
37-9 
29-4 
29-1 
31-9 
22-9 
27*9 
26-8 
32-7 
21*5 
1829. 
26-2 
27-6 
31-8 
28-6 
26-3 
36-7 
26-0 
29-8 
24-3 
28-1 
25-9 
27-8 
1830. 
25'5 
38-6 
33-0 
42*3 
34*7 
30*1 
.37-0 
31*7 
26-0 
31-3 
25-5 
31-4 
1831. 
24-2 
32-8 
27-7 
29-9 
38-8 
27-1 
28-5 
25-3 
25-7 
27-9 
28-5 
25-8 
1832. 
20-9 
21-3 
24-6 
30-3 
36-3 
29-9 
31-6 
34-8 
31-3 
28-8 
23*0 
23-5 
1833. 
19-3 
22-8 
26-4 
28-4 
38-0 
34-2 
33-2 
27*1 
26-2 
24-0 
28‘1 
22-7 
1834. 
22-7 
25-4 
27-1 
3M 
32-0 
39*4 
35-3 
39-1 
27*2 
35-8 
28-3 
25-3 
1835. 
24*7 
25-3 
21-5 
36-2 
3M 
39-0 
33-6 
28-8 
29-9 
27-2 
20-6 
30-6 
1 836. 
35-9 
25-3 
32-6 
29-1 
34*2 
34-9 
39-0 
25-0 
28-9 
31*2 
25*4 
28-3 
1837. 
26-7 
24-0 
22-3 
31*2 
33-1 
32-6 
32-1 
30-3 
25-3 
33-1 
28-4 
23-6 
1838. 
38-8 
23-9 
27*3 
34-4 
37-1 
35-5 
29-4 
29-3 
26-7 
30-7 
27-7 
25-2 
1839. 
28-1 
24-5 
27*2 
28-2 
38-5 
39-4 
31-7 
33-2 
25-0 
26-2 
21-5 
22-6 
1840. 
31-9 
23-0 
23-0 
37-8 
34-7 
27-8 
27-6 
34-0 
25-4 
30-3 
34-3 
1841. 
37-9 
30-6 
29-2 
35-7 
34*1 
41-7 
30-5 
27-5 
31-8 
27-1 
30-4 
25-9 
1842. 
17-3 
21-0 
24-9 
35-1 
36-5 
30-9 
32-3 
37-0 
31-6 
26-7 
19-9 
22-8 
1843. 
27*9 
29-2 
30-5 
33-0 
33-1 
32*4 
At the Royal Observatory, Greenwich. 
1840. 
37-4 
38-8 
1841. 
i 49-0 
42-2 
37-4 
44-7 
41*6 
38-2 
31-7 
34-1 
43-0 
32*4 
36-1 
29-6 
1842. 
; 23-6 
26-8 
30-6 
45-7 
38-3 
42-7 
33-3 
43-0 
34*7 
32-6 
24-8 
27-4 
1843. 
33-0 
31-6 
37-2 
43-6 
32*2 
34-4 
45-2 
35‘6 
45-9 
41-9 
30-1 
29-1 
1844. 
34-9 
30-4 
36-1 
41-5 
43-5 
44-2 
40-3 
32-6 
43-2 
36-6 
30-7 
28-2 
1845. 
■ 26-9 
40-8 
46-3 
40-8 
33-8 
42-2 
38*7 
34-6 
40*1 
36-2 
30-5 
27-5 
1846. 
25-9 
35-4 
31*5 
29-7 
46-0 
41-7 
44-2 
44-5 
47-2 
32-7 
38-1 
3M 
1847. 
: 29-7 
44-8 
47-3 
36-8 
50-2 
39-4 
43-6 
45-3 
40-5 
40-2 
41-8 
34-5 
1848. 
1 34-6 
25'8 
44-2 
45-3 
49-5 
39-7 
43-1 
33-0 
46-0 
41-6 
32*6 
41-0 
1849. 
36-4 
1 
31-2 
33-0 
35-7 
38*2 
42-1 
37'1 
40-1 
36-3 
38-2 
38-2 
35-9 
