600 MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS TAKEN AT 
Table XXVI. — Showing the highest and lowest readings by 
were in use at the Apartments of the Royal Society, and at the 
the self-registering 
Royal Observatory, 
January. 
February. 
March. 
April. 
May. 
June. 
Reading of the thermo- 
Reading of the thermo- 
Reading of the thermo- 
Reading of the thermo- 
Reading of the thermo- 
Reading of the thermo- 
Year. 
meters in the month. 
meters in the month. 
meters in the month. 
meters in the month. 
meters in the month. 
meters in the month. 
Lowest. 
Highest. 
Lowest. 
Highest. 
Lowest. 
Highest. 
Lowest. 
Highest. 
Lowest. 
Hig. est. 
Lowest. 
Highest. 
0 
O 
1794. 
22 
51 
35 
56 
34 
56 
38 
73 
40 
71 
46 
79 
1795. 
7 
46 
24 
51 
24 
54-5 
36 
61 
36 
81-5 
41 
77-5 
1796. 
36 
56 
30 
56 
26-5 
60 
36 
70 
39 
65 
45 
80 
1797. 
25 
49 
24-5 
50 
27-5 
54 
34 
65 
34 
79 
40 
73 
1798. 
28 
53 
24 
54 
30 
58 
30 
69 
43 
76 
47 
86 
1799. 
20 
50 
18 
56 
28 
56 
27 
59 
36 
70 
43 
77 
1800. 
18 
51 
25 
53 
23 
57 
38 
62 
40 
75 
43 
75 
1801. 
24 
54 
25 
57 
31 
59 
30 
67 
39 
71 
43 
80 
1802. 
15 
48 
29 
56 
27 
65 
33 
68 
31 
76 
40 
78 
1803. 
19 
48 
19 
53 
25 
66 
36 
72 
38 
69 
49 
74 
1804. 
27 
55 
25 
51 
28 
62 
34 
71 
44 
73 
47 
87 
1805. 
25 
48 
23 
54 
29 
62 
35 
64 
37 
72 
41 
75 
1806. 
28 
55 
30 
56 
26 
56 
31 
64 
43 
75 
46 
83 
1807. 
23 
51 
25 
57 
25 
55 
31 
77 • 
44 
84 
48 
77 
1808. 
18 
53 
18 
53 
26 
54 
27 
64 
42 
82 
48 
76 
1809. 
20 
55 
34 
57 
33 
62 
29 
57 
36 
78 
45 
78 
1810. 
14 
51 
18 
54 
28 
59 
31 
69 
34 
67 
45 
78 
1820. 
20 
53 
26 
52 
28 
66 
36 
67 
39 
70 
45 
85 
1821. 
25 
52 
25 
61 
31 
58 
36 
72 
37 
70 
43 
73 
1822. 
31 
51 
34 
54 
35 
66 
35 
64 
45 
75 
50 
84 
1823. 
24 
40 
75 
43 
74 
1824. 
25 
52-5 
28 
52 
28 
56 
28 
66-5 
42 
73 
43 
74 
1825. 
30 
54 
26 
51 
28 
53 
34 
66 
40 
71-5 
42 
81 
1826. 
16 
47 
32 
54 
36-5 
72-5 
49-8 
87-5 
1827. 
16 
48-8 
19 
52-5 
31-2 
57-6 
32-8 
73-5 
37-8 
698 
46-3 
74-5 
1828. 
28 
54-5 
29 
55-2 
29-1 
61-3 
32-8 
70-7 
42-7 
72- 1 
49-3 
78-4 
1829. 
19-5 
45-7 
23-2 
50-8 
20-8 
58-6 
30-7 
59-3 
44-3 
70-6 
411 
77-8 
1830. 
17-2 
42-7 
17-7 
56-3 
32-7 
65-7 
29-7 
72-0 
42-6 
77-3 
46-6 
76-7 
1831. 
24-3 
48-5 
26-7 
59-5 
31-7 
59-4 
35-3 
65-2 
OO.C 
Ot/ O 
72-6 
48-6 
75-7 
1832. 
27-8 
48-7 
28-3 
49-6 
30-7 
55-3 
36-7 
67-0 
38-4 
74-7 
46-8 
76-7 
1833. 
27-3 
46-6 
32-4 
55-2 
27-8 
54-2 
340 
62-4 
43-4 
81-4 
46-6 
80-8 
1834. 
32-5 
55-2 
29-3 
54-7 
30-7 
57-8 
33-2 
64-3 
43-0 
750 
47-3 
86-7 
1835. 
250 
49-7 
27-9 
53-2 
32-7 
54-2 
30-0 
66-2 
41-7 
72-8 
44-6 
83-6 
1836. 
17-5 
53-4 
25-3 
50-6 
31-8 
64-4 
32-2 
61-3 
35-3 
69-5 
47-7 
82-6 
1837. 
24-0 
50-7 
300 
54-0 
26-7 
49-0 
28-0 
59-2 
35 '0 
68-6 
43-2 
75 8 
1838. 
11-4 
50-2 
24-8 
48-7 
31-0 
58-3 
29-8 
64-2 
36-2 
73-3 
44’2 
797 
1839. 
23-7 
51-8 
26-8 
51-3 
26-0 
53-2 
30-5 
58-7 
33-7 
72-2 
45-6 
85 0 
1840. 
223 
54-2 
27-8 
50-8 
30-7 
53-7 
34-4 
72-2 
41-3 
48-3 
83-0 
1841. 
14‘9 
52-8 
21-6 
52-2 
350 
64-2 
36-7 
72-4 
45'3 
79-4 
45-3 
87-0 
1842. 
27-3 
44-6 
320 
530 
33-6 
58-5 
34-2 
69-3 
41-8 
78-3 
52-7 
83-6 
1843. 
29-8 
57-7 
23-8 
53-0 
30-5 
610 
33-0 
66-0 
40-3 
73-4 
47-3 
79-7 
At the Royal Observatory, Greenwich. 
1840. 
1841. 
40 
530 
12-4 
54-6 
29-5 
66-9 
31-8 
76-5 
41-2 
82-8 
40-3 
78-5 
1842. 
23-2 
46-8 
26-4 
53-2 
29-9 
60-5 
28-0 
73-7 
36-4 
74-7 
44-7 
87-4 
1843. 
240 
570 
20-3 
51-9 
26-5 
63-7 
27-2 
70-8 
37-3 
69-5 
42-9 
77-3 
1844. 
18-8 
53-7 
200 
50-4 
241 
60-2 
33-4 
74-9 
33-9 
77-4 
43-4 
87-6 
1845. 
24-4 
51-3 
7-7 
48-5 
131 
59-4 
29-5 
70-3 
34-4 
68-2 
43-8 
86-0 
1846. 
29-4 
55-3 
26-9 
62-3 
26-5 
58-0 
33-3 
63-0 
38-3 
84-3 
49-4 
91-1 
1847. 
23-0 
52-7 
10-2 
550 
16-9 
64-2 
27-0 
63-8 
36-0 
86-2 
41-0 
80-4 
1848. 
15-8 
50-4 
29-2 
55 0 
27-3 
71-5 
29-7 
75-0 
33-5 
83-0 
38-7 
78-4 
1849. 
200 
56-4 
26-8 
58-0 
27-7 
60-7 
28-6 
64-3 
368 
75-0 
38-6 
807 
By comparing the readings of the two places for the years 1841, 1842 and 1843, it 
grees below those at the Apartments of the Royal Society. In January 1841 the 
the difference is wholly attributable to the effect of the comparative heated water of 
places at some distance from and those near the river. The maximum temperatures 
1841 at Somerset House I think must be erroneous. 
