THE ROYAL SOCIETY, AND AT THE ROYAL OBSERVATORY, GREENWICH. 579 
Table XVI. — Comparison of the temperature of the Air at Somerset House, and at 
the Royal Observatory, Greenwieb, and deduction of the numbers in every month, 
necessary to be applied to reduce the mean values at one place to those at the other. 
January. 
February. 
March. 
Mean reading of the thermometer 
Mean reading of the thermometer 
Mean reading of the thermometer 
in air 
in air 
in air 
Year. 
At tlie 
At 
Higher at 
At the 
At 
Higher at 
Somerset 
At the 
At 
Higher at 
Koyal Ob- 
Somerset 
Somerset 
Roval Ob- 
Somerset 
Royal Ob- 
Somerset 
Somerset 
servatory. 
House. 
House. 
servatory. 
House. 
House. 
servatory. 
House. 
House. 
1834. 
O 
44-1 
46-0 
O 
1*9 
40-5 
41*6 
O 
1-1 
43*8 
45-1 
O 
1-3 
1835. 
37-7 
39-6 
1-9 
41-0 
42-6 
1-6 
41-2 
42-1 
0*9 
1836. 
38-5 
38-8 
0-3 
37-1 
38-3 
1-2 
43-7 
44-8 
M 
1837. 
38-3 
38*8 
0 5 
41-2 
41-7 
0-5 
36-0 
36-9 
0-9 
1838. 
28-3 
30-5 
2*2 
32-1 
34*3 
2-2 
41-6 
42*6 
1-0 
1839. 
36-6 
38-8 
2*2 
39-6 
40-5 
0-9 
38-4 
40-1 
1-7 
1840. 
39-6 
40-6 
1-0 
37-0 
39-5 
2-5 
37-2 
38-7 
1-5 
1841. 
33-6 
36-1 
2-5 
35-3 
36-6 
1-3 
46-2 
47-9 
1-7 
1842. 
32-9 
34*8 
1-9 
40-8 
42-2 
1*4 
44-9 
45-4 
0-5 
184.3. 
. 39-9 
41-3 
1-4 
36-0 
37-5 
1-5 
42-9 
43-6 
0-7 
April. 
May. 
June. 
1834. 
44-7 
46*1 
1-4 
56-2 
58-0 
1-8 
59-6 
62-0 
2-4 
1835. 
46-1 
47-5 
1-4 
52-3 
54-0 
1-7 
58-7 
60-9 
2-2 
1836. 
42-7 
44-4 
1-7 
52*2 
53-9 
1-7 
60-0 
59-9 
-0-1 
1837. 
39-6 
40-2 
0-6 
48-6 
48*9 
0-3 
60-9 
59*0 
-1-9 
1838. 
41-4 
42-7 
1-3 
51-7 
51-8 
0-1 
56*6 
58-1 
1-5 
1839. 
40-4 
42-0 
1-6 
50-0 
51-0 
1-0 
59-5 
59*6 
0-1 
1840. 
48-6 
48-9 
0-3 
53*2 
54-6 
1-4 
57-9 
60-4 
2-5 
1841. 
47-0 
47-4 
0-4 
56-8 
57*9 
M 
56-4 
57-2 
0-8 
1842. 
45-2 
45-7 
0*5 
53*2 
54*3 
M 
62-9 
64-2 
1-3 
1843. 
47-1 
48*6 
1*5 
52-2 
52-8 
0'6 
56*3 
56-4 
0-1 
July. 
August. 
1 September. 
1833. 
59-7 
62-1 
2-4 
56-9 
58-8 
1-9 
53-0 
54-6 
1-6 
1834. 
64-0 
65-1 
M 
61-5 
63*6 
2-1 
57*0 
59-4 
2-4 
1835. 
63-9 
65*4 
1*5 
63-0 
64-6 
1-6 
57-6 
58-2 
0-6 
1836. 
62-8 
63-9 
]-l 
59-8 
60-2 
0-4 
53*7 
54-5 
0-8 
1837. 
59-6 
61-4 
1-8 
56-1 
56-1 
0-0 
1838. 
61-0 
61-5 
0-5 
60-0 
60-9 
0-9 
55*7 
55-5 
— 0-2 
1839. 
60-8 
61-2 
0-4 
58-6 
60-2 
1-6 
55-5 
56-7 
1-2 
1840. 
59-3 
59-0 
— 0*3 
63-0 
63-4 
0-4 
52-5 
55-2 
2-7 
1841. 
57*8 
59-0 
1-2 
60-5 
61-3 
0-8 
58-0 
58-5 
0-5 
1842. 
60-2 
61-5 
1-3 
65-4 
66-6 
1-2 
56*4 
57-5 
M 
October. 
November. 
December. 
1833. 
50-5 
49-6 
-0-9 
42-8 
44-8 
2-0 
44*7 
46-0 
1-3 
1834. 
51-1 
51*8 
0-7 
43-9 
45-4 
1-5 
40-6 
42-4 
1-8 
1835. 
48-0 
49-3 
1*3 
44-0 
44-3 
0-3 
35-7 
36-3 
0-6 
1836, 
47-9 
48-7 
0-8 
41-9 
42-8 
0-9 
39-6 
410 
1-4 
1837. 
50-1 
51-9 
1*8 
40-6 
42-4 
1-8 
40-5 
42-6 
2-1 
1838. 
49-7 
51-3 
1-6 
40-9 
42-1 
1-2 
38-4 
40-0 
1*6 
1839. 
48-8 
50-2 
1-4 
44-8 
46-0 
1-2 
39-6 
41-0 
1-4 
1840. 
45-7 
48-1 
2-4 
44-0 
44-7 
0-7 
32-3 
34-7 
2-4 
1841. 
48-8 
50-7 
1-9 
42-7 
44-5 
1-8 
40-5 
42-0 
1-5 
1842. 
45-4 
47-2 
1-8 
42-8 
44-2 
1-4 
45-0 
45-3 
0-3 
4 E 2 
