598 MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS TAKEN AT 
Table XXV. — Showing the monthly mean reading of the minimum temperature, and 
during the whole time that the maximum and minimum self-registering thermo- 
vember, at the Royal Observatory, Greenwich. 
January. 
February. 
March. 
April. 
May. 
June. 
Blean of all the 
Blean of all the 
Mean of all tlie 
Mean of all the 
Mean of all the 
Mean of all the 
Year. 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
1794. 
1795. 
1796. 
1797. 
1798. 
1799. 
1800. 
1801. 
1802. 
1803. 
1804. 
1805. 
1806. 
1807. 
1808. 
1809. 
1810. 
1820. 
1821. 
1822. 
1823. 
1824. 
1825. 
1826. 
1827. 
1828. 
1829. 
1830. 
1831. 
1832. 
18.33. 
1834. 
1835. 
1836. 
1837. 
1838. 
1839. 
1840. 
1841. 
1842. 
1843. 
320 
23-0 
43-8 
34- 7 
36-1 
32- 1 
35- 7 
371 
31-2 
33- 1 
41- 8 
33-6 
38-8 
35-5 
35-2 
33-8 
33- 6 
30- 5 
35'6 
35- 8 
36- 6 
37- 3 
29-8 
31- 2 
37-5 
301 
29‘3 
32- 5 
34- 5 
32-8 
42- 5 
35- 3 
34- 5 
35- 3 
271 
34-7 
36- 9 
32-7 
320 
37- 7 
38-5 
29-7 
50-8 
40- 0 
43-2 
38-5 
41- 7 
45'0 
37‘4 
37- 5 
47-8 
38- 9 
46-0 
42- 8 
42- 5 
40- 3 
39- 0 
37-9 
43- 7 
460 
41- 7 
43-3 
37- 3 
39- 2 
45-0 
36-3 
35-0 
38- 9 
40’8 
390 
49-0 
431 
43-8 
42- 7 
34-4 
43- 3 
43-5 
40- 3 
38- 1 
45-7 
43-6 
32- 8 
37- 9 
38- 9 
35- 2 
33- 8 
331 
36- 8 
370 
34- 6 
35- 8 
36- 5 
39- 3 
37- 4 
341 
41-8 
37- 2 
35- 3 
33- 5 
40- 5 
37- 7 
36- 7 
40-4 
29- 3 
38- 4 
36-4 
30- 9 
38- 5 
34- 7 
39- 6 
36- 7 
37- 1 
34-0 
38- 0 
31- 2 
371 
365 
34-9 
38-4 
34-9 
49- 5 
390 
45- 9 
42-9 
44-8 
42- 9 
40-7 
43- 9 
44- 7 
42-0 
431 
44-9 
47-5 
46- 2 
42- 5 
50- 0 
43- 7 
43-0 
43-4 
50-7 
43- 8 
44- 2 
47- 9 
37- 5 
45- 2 
43-7 
40-5 
47- 2 
42-6 
48- 1 
46- 6 
47- 7 
42-3 
46- 5 
38- 4 
47- 7 
42-4 
40- 8 
46-4 
41- 6 
40-6 
35-6 
35-3 
34- 3 
37- 5 
35- 0 
34-7 
411 
36- 7 
38- 8 
38-4 
38- 4 
39- 0 
34- 0 
35- 2 
396 
39-2 
37- 2 
39- 6 
44-0 
37- 3 
36- 4 
40- 1 
400 
35- 9 
41 '5 
40-9 
36- 9 
34- 6 
40-4 
371 
40- 2 
33-9 
38- 1 
37- 4 
35- 9 
42-7 
41- 6 
39- 6 
51-4 
45- 3 
46- 6 
45- 7 
48- 1 
440 
44-1 
50-7 
49- 6 
50- 3 
47- 8 
49-4 
46- 5 
44- 6 
43- 3 
49-9 
49- 1 
59-3 
50- 6 
55-5 
45- 7 
45-2 
49- 7 
510 
45-7 
539 
50- 8 
47- 7 
44- 3 
51- 3 
48- 3 
50- 5 
42-6 
49- 2 
44-2 
41-7 
55-4 
51- 5 
500 
45-8 
42- 4 
43- 1 
41-0 
441 
39-1 
45’6 
39- 8 
43-3 
43- 9 
45-3 
41-4 
40- 3 
44- 7 
391 
38- 0 
42 2 
44-9 
45 "4 
43- 9 
io’i" 
441 
44- 6 
43- 3 
431 
40- 6 
44- 1 
451 
420 
41- 7 
40-3 
42- 4 
40-5 
37-3 
39- 2 
39-7 
43- 3 
43- 2 
411 
44- 0 
58-9 
53-3 
57- 9 
53- 7 
59'5 
491 
560 
55-8 
58- 6 
57- 3 
51-7 
54- 6 
508 
55- 8 
51-4 
49- 7 
54- 9 
59- 5 
58- 7 
55- 3 
51- 6 
58-6 
58-8 
55- 3 
55'0 
52- 4 
57-9 
57-2 
56- 4 
54-7 
54- 4 
55- 8 
51-3 
470 
50- 9 
46-0 
53- 5 
56- 4 
53-8 
57- 9 
46-5 
46- 3 
45-5 
45-7 
49- 0 
45- 5 
50- 9 
47- 2 
540 
46- 7 
52-4 
45 0 
49- 9 
511 
52-2 
50- 2 
45 '2 
48- 3 
44-9 
52-6 
49- 7 
46-5 
48- 5 
46-3 
49- 1 
500 
48-4 
500 
471 
46-3 
52-9 
50- 5 
48- 0 
44-7 
44-4 
45 '8 
45 ’0 
49- 6 
52-4 
48-8 
48-2 
60-1 
62-1 
59-7 
620 
63- 7 
590 
64- 3 
63- 3 
61-8 
59-4 
66-8 
59-6 
651 
64- 2 
67-8 
65- 2 
59- 7 
62- 7 
60'5 
650 
64-2 
58-5 
63- 1 
60- 8 
61-6 
64- 2 
64-9 
64-8 
630 
61-6 
70-4 
67-7 
62-5 
60-6 
57-6 
61-3 
00-5 
68'0 
64-9 
64-3 
52-3 
50- 9 
51- 2 
49- 2 
55- 2 
50- 5 
511 
52- 7 
51- 6 
52- 3 
55'1 
502 
54- 2 
52- 5 
53- 8 
52-3 
52-7 
52-5 
50- 2 
58-3 
49-9 
5M 
51- 9 
56- 4 
52- 8 
55- 9 
541 
520 
54- 7 
55- 2 
54-5 
550 
54- 6 
55- 2 
53- 8 
53- 6 
54- 9 
55- 5 
52-2 
58-3 
51-9 
o 
67- 7 
63- 3 
66- 7 
65-9 
72-8 
65-7 
64- 7 
68- 9 
67- 6 
65- 5 
71-8 
65- 3 
70-9 
68- 2 
68- 3 
68-2 
700 
66- 2 
63- 6 
73- 6 
66- 4 
64- 6 
69- 7 
74- 6 
67- 5 
70- 2 
69-6 
65- 2 
69-0 
69- 5 
70- 6 
725 
70-7 
69- 1 
68- 5 
68-6 
70- 2 
71- 2 
69- 7 
76-6 
67-6 
At the Royal Observatory, Greenwich. 
1840. 
1841. 
1842. 
1843. 
1844. 
1845. 
1846. 
1847. 
1848. 
1849. 
28- 4 
29- 3 
35-4 
341 
34- 3 
39-4 
31-5 
29-8 
35- 7 
39- 5 
36-6 
44- 7 
43-9 
43-3 
48-1 
40- 1 
381 
45- 2 
31-6 
36'0 
31-9 
30-9 
27-9 
39-3 
30-5 
380 
36-5 
40-7 
46-6 
40- 2 
41- 6 
38-4 
49'0 
41-5 
48- 7 
49- 4 
38- 7 
39- 2 
37- 5 
35-7 
30-8 
38- 1 
34-3 
I 36-4 
1 36-3 
56-2 
51-8 
505 
48-9 
42-4 
51-6 
50-1 
50-7 
50- 1 
39- 9 
37-3 
40- 7 
41- 8 
39-3 
41-8 
36-8 
39-0 
36-5 
56- 4 
54- 7 
57- 9 
63-6 
57-5 
56- 4 
55- 4 
57- 2 
52-5 
48-4 
450 
45 '5 
45- 1 
42- 7 
47-4 
47-5 
43- 4 
46- 7 
69-7 
64- 5 
63-3 
65- 9 
59-6 
66- 7 
680 
75-4 
63-8 
48- 2 
52-2 
490 
51- 6 
52- 2 
551 
49- 7 
38-7 
48-5 
670 
75-2 
670 
74-1 
72-5 
80-4 
69-4 
78-4 
69-1 
i 
1 
