THE ROYAL SOCIETY, AND AT THE ROYAL OBSERVATORY, GREENWICH. 599 
the monthly mean reading of the maximum temperature of Air as observed daily, 
meters were in use at the Apartments of the Royal Society, and from 1840 , No- 
1840. 
1841. 
1842. 
1843. 
1844. 
1845. 
1846. 
1847. 
1848. 
1849. 
Tear. 
July. 
I August. 
September. 
Mean of all the 
Mean of all the 
Mean of all the 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
Blinimtun 
readings. 
i\Iaximum 
readings. 
1794. 
59-9 
76-4 
55-3 
70-2 
50-8 
61-3 
1795. 
530 
66-1 
56-6 
717 
55-6 
70-4 
1796. 
53-7 
68-7 
54-4 
70-9 
54-6 
67-4 
1797. 
56-5 
75-8 
53-8 
70-0 
50-4 
63-5 
1798. 
55-8 
717 
57-8 
73-6 
52-5 
651 
1799. 
55-6 
691 
53-4 
677 
49-9 
63-0 
1800. 
571 
747 
57-6 
752 
54-1 
661 
1801. 
55'1 
70-9 
57-4 
73-4 
55-3 
67-0 
1802. 
51-3 
66-9 
58-5 
763 
520 
68-5 
1803. 
58-4 
707 
56-5 
72-6 
46-9 
63-8 
1804. 
57-9 
697 
56-3 
700 
55-3 
68-5 
1805. 
551 
69-1 
58-0 
720 
54-9 
68-6 
1806. 
571 
70-9 
57-2 
71-9 
530 
66- 1 
1807. 
590 
74-3 
60-0 
737 
487 
61-4 
1808. 
59-8 
76-9 
5 S -4 
72-5 
521 
63-8 
1809. 
55-6 
69-4 
59-5 
69-4 
53-0 
64-6 
1810. 
55-8 
707 
55-9 
70-8 
55-2 
680 
1820. 
56-3 
68-8 
557 
69-8 
497 
64-1 
1821. 
540 
67-3 
58-2 
71 -3 
56-4 
677 
1822. 
59-3 
70-6 
587 
69-9 
53-2 
641 
1823. 
55 ’4 
677 
56-9 
68-6 
51-2 
64- 1 
1824. 
57-4 
721 
56-9 
69-1 
54-9 
651 
1825. 
59-9 
74-5 
57-5 
71 0 
577 
68-0 
1826. 
61-2 
73-6 
54-3 
65-3 
1827. 
58-1 
73-4 
55-2 
68-8 
54-2 
650 
1828. 
58-3 
71-5 
55-9 
68-6 
54-2 
66-4 
1829. 
56-2 
69-8 
55-2 
66-6 
50-3 
61-6 
1830. 
58-1 
730 
53-9 
68-5 
50-1 
620 
1831. 
58-3 
76-6 
59-9 
73-2 
52-9 
65-2 
1832. 
561 
71-2 
56-8 
71-3 
51-8 
66-2 
1833. 
56-1 
71-5 
53-0 
68-4 
49-4 
62-5 
1834. 
59-3 
747 
57-9 
72-8 
541 
67-3 
1835. 
57-3 
74-8 
58-4 
73-8 
52-8 
65-8 
1836. 
571 
71-9 
54-5 
68-9 
50-3 
01-2 
1837. 
56-7 
717 
56-6 
700 
517 
63-2 
1838. 
560 
70-8 
56-4 
690 
51-5 
62-6 
1839. 
56-7 
69-9 
55-4 
68-6 
53-0 
63-5 
1840. 
54-9 
69-8 
57-9 
727 
50-0 
63-3 
1841. 
54-8 
68-8 
57-2 
70-0 
517 
67-3 
1842. 
55-5 
73-5 
60-8 
76-0 
53-5 
65-6 
At the Royal Observatory, Greenwich. 
October. 
November. 
December. 
Mean of all the 
Mean of all the 
Mean of all the 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
Minimum 
readings. 
Maximum 
readings. 
45-9 
55-0 
41-6 
49- 1 
35-3 
46- 1 
510 
60-3 
38-2 
46'9 
43-2 
48-9 
44-3 
52-9 
38-9 
451 
28-4 
357 
44-3 
53-3 
38-8 
48-0 
387 
46-3 
470 
570 
37-8 
45-3 
32-2 
38-0 
45 0 
547 
411 
48-0 
32-3 
36-3 
44-8 
55-4 
39-9 
48-1 
371 
42-0 
477 
577 
38-5 
45-8 
34-3 
41-5 
46-3 
587 
391 
45 7 
35-8 
430 
46-3 
56-2 
39 7 
477 
40'2 
45-4 
48-4 
58-9 
42 7 
48-8 
34-8 
397 
45 '0 
53-9 
37-6 
45’6 
37-5 
44-3 
48-4 
58-0 
45-5 
531 
44-8 
507 
50-2 
60-2 
36-9 
450 
347 
41-4 
43-2 
53-8 
42-3 
491 
35-2 
40-6 
47-2 
56-3 
37-5 
451 
38-8 
45-3 
477 
58-8 
44-2 
55-5 
39-8 
48-1 
38-5 
45-3 
47-0 
58-8 
44-3 
540 
41 0 
50-6 
50-3 
58-6 
47-1 
541 
34-5 
41-3 
45 0 
53-9 
42-0 
46-8 
38-9 
440 
47-5 
56-3 
43-2 
51-4 
39-6 
46-3 
487 
56-9 
38-3 
46-4 
39-2 
43-9 
50-3 
59-4 
38-3 
45-5 
40-8 
457 
49-2 
58-5 
39-5 
48-0 
41-0 
49-1 
46-2 
57-0 
41-8 
49-9 
42-6 
49-2 
45-8 
53-9 
367 
44-9 
31-4 
36-6 
47-0 
58-4 
41-9 
497 
32-2 
39-4 
531 
61-6 
39-3 
49-1 
40-6 
460 
48-4 
57-9 
41-9 
49-0 
39-0 
470 
46-9 
581 
40-4 
49-1 
40-8 
50-3 
46-2 
58-2 
41-4 
49-4 
38-1 
45-6 
45-4 
54-5 
41-5 
47-5 
33-6 
39-6 
45-3 
53-5 
387 
47-6 
380 
44-4 
461 
58-8 
37-2 
490 
39-8 
46-0 
470 
57-4 
38-9 
46-8 
37-5 
43-5 
47-3 
54-3 
43-8 
48-0 
38-0 
41-8 
43-2 
54-8 
40-8 
507 
31-5 
38-8 
47-0 
56-9 
40-8 
49-8 
38-8 
471 
42-9 
53-4 
41-5 
490 
41-9 
50-5 
51-5 
67- 1 
54-3 
70-6 
51-2 
67-2 
43-9 
55-6 
357 
38-0 
467 
487 
271 
35-4 
361 
44-8 
52'1 
71-2 
56‘3 
78-1 
49-8 
64-3 
39-3 
53-4 
39'0 
48-1 
40-2 
49*4 
«)tf *•} 
71-8 
55-2 
72-5 
52-3 
70-4 
42-0 
55-5 
38-5 
50-0 
40-3 
48-2 
54'1 
72-8 
50-3 
67-9 
50-2 
67-5 
44-4 
567 
39-6 
48-1 
30-4 
36-8 
53 ‘5 
71-2 
50-5 
677 
46-9 
63-9 
44-0 
590 
40-3 
51-8 
35-8 
47-6 
56'5 
77-9 
56'6 
74-4 
51-4 
71-9 
44-5 
587 
400 
50-3 
27-9 
37-2 
54-8 
78-1 
52’8 
74-4 
46’ 1 
649 
46-4 
01-5 
40-8 
527 
37-2 
46 7 
51-2 
737 
50-4 
68-9 
45-9 
66-8 
43-8 
59-2 
361 
50-5 
37-3 
48-9 
51'6 
74-2 
54’0 
74-2 
51-2 
687 
441 
59-2 
381 
49-8 
341 
43-2 
