MADE AT THE APARTMENTS OF THE ROYAL SOCIETY. 
315 
Table V. — Showing the excess of the quarterly and yearly mean temperatures, in 
every year, above their means from all the years. 
Year. 
January, 
February, 
March. 
April, 
May, 
June. 
July, 
August, 
September. 
October, 
November, 
December. 
Whole 
year. 
Year. 
January, 
February, 
March. 
April, 
May, 
June. 
July, 
August, 
September. 
October, 
November, 
December. 
Whole 
year. 
0 
0 
0 
0 
0 
0 
0 
1774. 
— 1-4 
-f 0-6 
-0-5 
-1-8 
-0-7 
1811. 
+ 0-1 
+ 1-4 
— 1-1 
+ 2-7 
+0-7 
1775. 
+ 2-9 
+ 3-4 
+ 1-3 
-0-9 
+ 1-6 
1812. 
+ 0-2 
-3-2 
—2-6 
— 2-1 
-1*9 
1776. 
-1-6 
-l-O-l 
0-0 
+ 1-3 
—0-1 
1813. 
+ 1-3 
-1-6 
— 2-2 
— 2-1 
-1-2 
1777. 
-0-3 
-1-2 
+ 1-0 
+ 0-1 
—0-2 
1814. 
— 6*5 
-2-0 
— 1-2 
— 0-4 
— 2-6 
1778. 
-1-6 
-i-2-3 
+ 1-8 
+ 1-0 
+0-9 
1815. 
+0-9 
+ 1-0 
+ 1-5 
— 1-1 
+ 0-6 
1779. 
-I-3-6 
4-2-4 
+ 3-8 
+ 1-8 
+ 1-9 
I8I6. 
-1-0 
-3-7 
— 2-3 
-0-9 
-2-0 
1780. 
-0-7 
+ 0-9 
+ 3-3 
— 1-4 
+ 0-5 
1817. 
+2-7 
-1-8 
— 3-2 
— 0-5 
-0-7 
1781. 
-I-1-2 
+ 1-1 
1818. 
+0-2 
+ 1-6 
+ 4-1 
+ 3-7 
+ 2-3 
1819. 
+2-9 
+ 0-9 
+ 1-8 
-1-7 
+ 0-9 
1787. 
+ 1-2 
-0-9 
-0-4 
-0-9 
-0'3 
1820. 
-1-8 
+ 0-5 
-1-9 
-0-7 
-1-1 
1788. 
•-0-2 
+ 2-7 
-0-6 
-3-9 
— 0-5 
1821. 
+ 0-3 
+ 2-5 
+ 0-3 
+ 3-9 
+ 0-9 
1789. 
-2-6 
— 1-4 
— 1-5 
— 1-1 
-1-7 
1822. 
+ 5-0 
+ 3-0 
+ 0-6 
+ 2-1 
+ 2-6 
1790. 
+ 2-5 
— 2-0 
-1-7 
0-0 
-0-3 
1823. 
-1-9 
-1-1 
— 1-3 
0-0 
-0-9 
1791. 
+ 1-8 
— 0-2 
-0-2 
-2-6 
— 0-3 
1824. 
— 0-8 
— 2-6 
+ 3-7 
+ 2-4 
-0-1 
1792. 
-0-3 
— 1-1 
-0-7 
+ 0-5 
-0-4 
1825. 
-0-1 
+ 1-7 
+ 2-9 
+ 0-7 
+ 1-2 
1793. 
-0-4 
—2-6 
-0-5 
+ 1-8 
— 0-4 
1826. 
+ 0-3 
+ 1-9 
+ 2-4 
+ 1-2 
+ 1-5 
1794. 
-1-2-3 
+ 0-5 
+ 0-1 
-0-7 
+ 0-5 
1827. 
-2-4 
+ 0-3 
+ 0-4 
+ 2-3 
+ 0-1 
1795. 
-6-3 
-1-9 
+ 0-8 
+ 2-8 
-1-2 
1828. 
+ 2-7 
+ 1-5 
+ 0-1 
+ 2-8 
+ 1-7 
1796. 
-f-2-8 
-0-8 
— 0-2 
— 4-4 
-0-7 
1829. 
-2-1 
+ 0-3 
— 2-4 
-2-9 
— 1-8 
1797. 
—2-1 
— 1-8 
— 0-4 
-0-3 
-1-2 
1830. 
— 1-5 
+ 0-7 
— 1-2 
-0-1 
-0-6 
1798. 
-I-0-3 
+ 2-6 
+ 0-4 
— 2-3 
+ 0-2 
1831. 
+ 1-4 
+ 1-3 
+ 1-9 
+ 3-6 
+ 2-0 
1799. 
— 2-8 
-3-2 
— 2-2 
— 2-5 
-2-7 
1832. 
+ 0-2 
+ 0-6 
+ 0-2 
+ 2-3 
+ 0-7 
1800. 
-2-3 
+ 0-4 
+ 2-2 
-0-7 
-0-1 
1833. 
-0-3 
+ 5-4 
-6-0 
+ 2-0 
+ 0-4 
1801. 
-I-2-3 
+ 0-4 
+ 1-2 
— 1-1 
+ 0-6 
1834. 
+ 4-4 
+ 0-6 
+ 2-2 
+ 1-7 
+ 2-2 
1802. 
-0-8 
0-0 
0-0 
— 2-5 
-0-9 
1835. 
+ 1-8 
+ 1-0 
+ 2-2 
-1-5 
+ 0-8 
1803. 
-1-1 
-0-7 
0-0 
+ 1-2 
-0-2 
1836. 
+ 0-8 
-0-4 
— 1-8 
-0-7 
— 0-3 
1804. 
+ 2-0 
+ 1-8 
+ 0-4 
+ 0-2 
+ 1-1 
1837. 
-0-7 
-3-7 
-0-6 
+ 0-8 
— 1-1 
1805. 
-0-1 
-2-3 
+ 0-6 
— 1-2 
-0-7 
1838. 
-4-0 
— 2-3 
-1-2 
+ 0-5 
-1-8 
1806. 
-t-2-5 
+ 0-3 
+ 0-3 
+ 3-0 
+ 2-1 
1839. 
0-0 
— 2-2 
— 1-1 
+ 0-9 
-0-7 
I8O7. 
-0-6 
+ 0-3 
+ 0-7 
-0-7 
0-0 
1840. 
— 0-2 
— 0-2 
-4-4 
— 2-3 
— 1-0 
1808. 
-1-6 
+ 0-2 
+ 1-8 
-1-5 
-0-3 
1841. 
+ 0-4 
+ 1-1 
-0-9 
+ 0-9 
+ 0-2 
I8O9. 
-f 0-6 
-0-6 
-1-2 
-0-1 
-0-4 
1842. 
+ 1-0 
+ 1-3 
+ 1-4 
+ 0-8 
+ 1-1 
1810. 
0-0 
-0-3 
+ 0-9 
+ 0-9 
+ 0-3 
1843. 
+ 1-0 
— 0-5 
The sign — denotes that the period was below the average, and the sign + denotes 
that the period was above the average. 
The numbers in the last column of this table indicate the excess or defect of the 
temperature of that year above or below the average. The year of lowest tempera- 
ture was 1799 , and every month in this year was below its average value except No- 
vember (see Table III.). The year of highest temperature was 1822, which by 
reference to Table III., was warm throughout, the months of September and December 
being those only whose temperatures were below their averages. The mean tempe- 
rature of the year, therefore, within this period has varied from 46°’9 in 1799 to 52°”2 
in 1822. The difference between these numbers is 5°’S. This amount of difference 
upon the whole year is very large. 
The quarterly values of temperature, as found in the preceding tables, do not repre- 
sent the mean value for any meteorological period ; the latter values always follow the 
astronomical divisions of the year. In the following Table the year is supposed to 
