1811.

Thermometer Thermometer
without.
within.

January

45

February

50

32 42,5 55

March

57

April

May

72

June

71

39 46,7 64 67 37 52,1 63 48 60,1 69 55 62,2 68 July 73 56 64,9 72 August 71 55 62,5 68 September 72 45 61,0 73 October 65 45 57,6 67 November 61 32 47,3 60 December 53 26 40,2 56

5

Barometer.

Deg Deg. Deg. Deg. Deg. Deg. Inches. Inches. Inches. Deg. Deg. Deg.

24 34,9 51 36 44,9 30,51 29,09 29,88 78

58 68,4

46 51,4 30,22 28,94 29,53 77

60 68,5

46 55,3 30,56

29,42 30,10 79
|

50 65,3

51 57,5 30,39 29,12 29,74 76 50 63,3

53 62,4

57 61,8 30,04 29,41 29,76 75
| | 75 51 63,4
60 63,3 30,28 29,11 29,86 76 51 59,7
61 68,0 30,23 29,67 29,99 75
59 64,1 30,33 29,46 29,92 70
55 64,9 30,31 29,26 29,99
52 60,4 30,28 28,71 29,67
49 51,2 30,49 29,36 29,99
43 51,1 30,25 29,00 29,59 77

53 61,2 72 51-62,7

74

61 68,5

62 69,1

62 70,0

Hygrometer.

Variation 24° 14' 2" West.

{Dip - 70° 32' 30".

76

Whole year

52,7

57,8

29,83

65,2

• The quicksilver in the bason of the barometer, is 81 feet above the level of low water spring tides at Somerset-house.

Rain from 25th May, 1811, to 31st December, 1811, 10,645 Inches.

Magnetic Needle, September, 1811..

TRANSACTIONS,

OF THE

ROYAL SOCIETY

OF

LONDON.

FOR THE YEAR MDCCCXII.

PART II.

LONDON,

PRINTED BY W. BULMER AND CO. CLEVELAND-ROW, ST. JAMES'S;

AND SOLD BY G. AND W. NICOL, PALL-MALL, BOOKSELLERS TO HIS MAJESTY,

AND PRINTERS TO THE ROYAL SOCIETY.

MDCCCXII.