584 MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS TAKEN AT 
Table XX. — Showing the excess of the monthly mean temperature at Greenwich, 
in every year, above the mean temperature of the month from all the years. 
Year . 
January . 
February . 
March . 
April . 
May . 
June . 
July . 
Au ^ st . 
September . 
October . 
November . 
December . 
1771. 
o 
- 5-8 
o 
-4-8 
o 
-6-2 
0 
-70 
+ 1-9 
o 
-40 
o 
-1-8 
o 
-21 
-4-3 
-21 
- i -5 
+2-6 
1772. 
- 3-5 
-4-0 
-2-4 
-3-5 
-40 
+ 1-4 
-1-3 
-0-8 
-1-3 
+31 
+ 1-0 
+07 
1773. 
4- 1-2 
-3-3 
0-0 
-1-5 
-5-1 
-2-4 
-2-8 
+0-4 
— 2-5 
-M 
-3-2 
-0-6 
1774. 
- 4-2 
-0-2 
+ 1-9 
+ 1-1 
-1-5 
+2-1 
+0-5 
+ 1-9 
-16 
-0-5 
-3-2 
-17 
1775. 
+ 4-7 
+3-7 
+0-8 
+4-0 
+ 1-5 
+4-6 
+ 17 
+0-3 
+2-1 
-M 
-22 
+ 0-5 
1776. 
- 8-7 
+ 1-8 
+2-8 
+ 1-5 
-20 
+07 
+ 1-5 
+0-2 
-1-8 
+2-2 
+0-3 
+ 1-3 
1777. 
- 1-8 
-2-4 
+3-7 
-1-7 
-0-3 
-17 
-0-8 
+ 1-9 
+ 1-8 
+2-0 
+ 1-3 
-30 
1778. 
- 0-9 
-2-6 
-0-8 
+ 1-2 
+2-2 
+3-3 
+57 
+3-0 
-2-9 
-3-3 
+2-3 
+4-0 
1779. 
- 0 9 
+7’1 
+6-1 
+5-0 
+21 
00 
+3-6 
+3-4 
+4-4 
+2-6 
-0-5 
+ 1-4 
1780. 
- 71 
-2-9 
+ 8-3 
-21 
+3-5 
+ M 
+ 1-9 
+5-2 
+3-0 
+07 
-2-9 
-2-2 
1781. 
+ 0-5 
+2'1 
+ 1-7 
+0-4 
+0-5 
+4-5 
+4-0 
+2-5 
- fO '5 
-0 8 
-07 
+2-2 
1782. 
+ 3-2 
-3-8 
-2-2 
-50 
-4-5 
-01 
-21 
-3-8 
-0-8 
-41 
-77 
-2-6 
1783. 
+ 1-2 
+ 1-0 
-.3-2 
+2-2 
-4-3 
+0-4 
+4-4 
+0-2 
-17 
-0-3 
+01 
-3-8 
1784. 
- 6-5 
-6-3 
-4-7 
-3-7 
+4-2 
-1-8 
-1-8 
-4-3 
+ 10 
-5-4 
-17 
-7-8 
1785. 
+ 0-4 
-7-8 
-7-0 
+0-5 
-01 
+ 1-4 
+0-9 
-30 
+0-5 
-2-4 
-2-2 
-3-6 
1786. 
+ 0-2 
-20 
-6-7 
-10 
-0-3 
+ 1-6 
-2-3 
-1-6 
-50 
-4-6 
-57 
-2-9 
1787. 
+ 10 
+ 1-3 
+ 1-9 
-1-3 
-1-3 
-0-2 
+0-1 
+0-6 
-1-9 
-07 
-2-8 
+0-8 
1788. 
+ 1-7 
+0-5 
-2-3 
+3-8 
+3-7 
+0-6 
-07 
-0-6 
-0-4 
-0-2 
-1-8 
-9-8 
1789. 
- 2-3 
+ 1-7 
— 6'5 
-1-6 
+0-6 
-3-2 
-2-5 
-0-3 
-17 
-2-5 
-37 
+2-8 
1790. 
+ 2-9 
+30 
+2-3 
-4-8 
0-0 
-1-2 
-2-2 
-06 
-2-4 
+0-2 
-0-4 
+0-2 
1791. 
+ 41 
+0-0 
+ 1-2 
+3'1 
-3-2 
-0'4 
-1-8 
+0-9 
+0-5 
-27 
-11 
-4-0 
1792. 
- 0-8 
-0-8 
+ 1-2 
+3-2 
-3-0 
-3-6 
-27 
+ 1-7 
-0-9 
-0-6 
+0-8 
+1-2 
1793. 
- 0-4 
+ 1-5 
-16 
-3-3 
-1-9 
-2-6 
+3'6 
— 15 
-35 
-26 
+0'5 
+2-2 
1794. 
- 2-4 
- i -6'5 
+3-4 
+3-9 
-20 
-0-4 
+4-0 
— M 
-26 
-10 
+0-9 
-20 
1795. 
-11-8 
-41 
-2-3 
-0-6 
-0-7 
-4-3 
-2-4 
+0-3 
+4-5 
+4-1 
-17 
+60 
1796. 
+ 9-6 
+ 1-4 
-1-9 
+2-6 
— 2’5 
-1-9 
-27 
-0-6 
+2-8 
-2-8 
-21 
-8-4 
1797. 
- 03 
-2-6 
-30 
-10 
-1-3 
-3-2 
+2-0 
-1-5 
-17 
-2-3 
-10 
+2-4 
1798. 
+ 2-1 
-0-3 
-0-2 
+3'5 
+ 10 
+ 3-2 
-01 
+ 1-0 
+0-2 
+0-5 
-2-4 
-51 
1799. 
- 2-4 
-1-8 
-3-7 
-4-2 
-31 
-24 
-1-5 
-0-5 
-20 
-2-0 
+0-5 
-60 
1800. 
+ 1'2 
-4-1 
-3-4 
+2-7 
+1-4 
-2-9 
+1-9 
+3-2 
+ 1-0 
-1-4 
-0-2 
-0-6 
1801. 
+ 3-8 
+0-3 
+3-2 
-0-3 
+ 10 
+0-4 
-0-8 
+20 
+2-4 
+ 1-6 
-2-2 
-27 
1802. 
- 2-8 
+0-7 
+0-3 
+2-8 
-2-4 
-0-4 
_4-8 
+4-3 
+07 
+0-2 
-1-9 
-10 
1803. 
- 2-3 
-1-9 
+ 1-4 
+21 
-2-5 
-1-8 
+2-4 
+ 1-2 
-3-9 
-0-4 
-0-5 
+4-5 
1804. 
+ 7-5 
-1-3 
+0-2 
-20 
+4-0 
+3-3 
-11 
-06 
+3‘1 
+2-1 
+ 17 
-3-2 
1805. 
- 12 
+0-5 
+ 11 
-0-4 
-30 
-3-5 
_2-2 
+1-2 
+30 
-1-9 
—2*5 
+07 
1806. 
+ 4-9 
+3-3 
-0-2 
-2-7 
+2-4 
+ 1-8 
-01 
+0-9 
+ 07 
+ 1-9 
+5-0 
+8-0 
1807. 
+ 1-0 
+ 1-8 
-3-9 
-0-3 
+2-4 
-0-3 
+2-2 
+3-2 
-3-2 
+37 
-37 
-2-2 
1808. 
+ 1*3 
-1-9 
-3-8 
-3-2 
+4-5 
00 
+4-4 
+20 
-10 
-3-2 
+ 1-5 
-2-8 
1809. 
- 03 
+5-9 
+ 1-7 
-4-6 
+3-1 
-0-5 
-17 
-1-6 
-0-2 
+0-3 
-2-9 
+2-2 
1810. 
- 1-3 
+ 0-4 
+ 1-3 
+0-7 
-2-9 
+0-5 
-0-4 
0-0 
+31 
+2-5 
+0-4 
-0-2 
1811. 
- 2-9 
+ 1-9 
+2'5 
+30 
+3-3 
-0-4 
-0-3 
-20 
+ 1-6 
+6-2 
+2-8 
-0-2 
1812. 
+ 0-2 
+3-4 
-2-5 
-4-2 
-1'4 
-40 
-3-9 
-3 5 
-0-4 
-0-5 
-1-8 
-37 
1813. 
- 1-3 
+3-4 
+2-2 
-1-9 
-0 3 
-27 
-2-4 
-2-2 
-1-8 
-2-0 
-2-2 
-2-2 
1814. 
- 8-8 
-4-2 
-5-8 
+2-4 
-40 
-4-6 
-0-2 
-1-9 
-1-4 
-20 
-17 
+2-3 
1815. 
- 3-8 
+3-0 
+41 
+0-9 
+21 
00 
-1-4 
-01 
+6-0 
+2-1 
-3-5 
-1-8 
1816. 
+ 1-0 
-1-6 
-1-7 
-2-3 
-3-8 
-4-9 
-6-8 
- 2-6 
+ 2-6 
+ 1-5 
-3 1 
-10 
1817. 
-|- 3‘5 
+4-4 
+0-7 
-1-8 
-4-7 
+ 11 
-3-6 
-5-1 
-08 
-4-3 
+4-5 
-17 
1818. 
+ 3-6 
-2-4 
00 
-01 
-01 
+4-9 
+4-9 
+3-1 
+4'4 
+4-4 
+6-8 
00 
1819. 
+ 4-4 
+ 1-8 
+3-1 
+2-5 
+ 1-6 
-16 
+0-4 
+3-3 
+ 1-8 
-1-8 
-1-6 
-1-8 
1820. 
— 40 
-1-3 
+0-4 
+3-6 
-0-6 
-1-9 
-1-8 
-20 
-1-9 
-2-3 
-1-0 
+ 1-1 
1821. 
+ 1-8 
-2-2 
+1-9 
+4-7 
-3-2 
-3-9 
-3-6 
+ 1-2 
+3-3 
+ 1-0 
+5-2 
+5-5 
1822. 
+ 4-1 
+51 
+6-4 
+1-0 
+3-2 
+4-6 
+ 12 
+0-8 
-0-3 
+27 
+5-8 
-2-4 
1823. 
- 3-9 
-01 
-11 
-2-9 
+2-0 
-2-6 
-2 2 
-07 
-0-9 
-17 
+00 
+ 1' 1 
1824. 
+ I '7 
-20 
-1-4 
-1-9 
-31 
-30 
+ 1-2 
-0-5 
+ 1-4 
+0-5 
+3-8 
+3-0 
1825. 
+ 2-7 
-01 
-2-4 
+3-0 
+ 1-0 
+0-9 
+3-9 
+1-3 
+3 6 
+ 1-5 
-1-2 
+ 1‘8 
1826. 
- 3-7 
+4-0 
+2-3 
+3-3 
-2-6 
+4-9 
+4-3 
+2-9 
00 
+3-1 
— 2*5 
+30 
1827. 
- 2-3 
-6-6 
+2-2 
+ 11 
+0-1 
-0-4 
+2-2 
-1-5 
+0-6 
+2’5 
-0-9 
+5-3 
1828. 
+ 41 
+2-0 
+2-6 
+0-8 
+1-7 
+2-0 
+0-6 
— I'O 
+ 1-2 
+0-6 
+ 1-9 
+57 
1 829. 
- 40 
+0-2 
-1-9 
-20 
+ 1-9 
+ 1-0 
-1-2 
-2-8 
-31 
-1-8 
-31 
-3-9 
1830. 
- 50 
-4-0 
+4-9 
+2-6 
+2-1 
-27 
+ 17 
-2-3 
-2-8 
+ 1-6 
+20 
-3-9 
1831. 
- 1-3 
+3-0 
+3-0 
+2'4 
+0-2 
+ 1-4 
+3-0 
+2-8 
+0-1 
+57 
+ 1-9 
+3-2 
1832. 
+ 1-6 
-1-3 
-0-4 
+1-5 
-11 
+ 1-2 
-01 
4-0*5 
+0-3 
+ 1-9 
+ 1-3 
+3-6 
1833. 
- 1-2 
+4-2 
-3-3 
-0-5 
+6-8 
+ 1-8 
-0-2 
-30 
_2-8 
-10 
+5-8 
1834. 
+ 8-7 
+2-0 
+31 
-0-7 
+4'3 
+3-1 
+2-8 
+ 1'8 
+2-0 
+ 1-2 
+17 
+2'2 
1835. 
+ 2-3 
+3-0 
+0-1 
+0-7 
+0-3 
+2-0 
+3-1 
+2-8 
+0-8 
-1-3 
+0-6 
-3-9 
1836. 
+ 1-5 
-1-3 
+2-8 
-2-4 
+0-2 
+ 10 
+ 1-6 
-1-6 
-2-9 
-1-9 
-0-9 
+ 0-8 
1837. 
+ 1-5 
+2-1 
-51 
-6-6 
-4-8 
+0-1 
00 
_0-4 
-1-3 
+ 1-3 
-13 
+2-4 
1838. 
- 6-8 
-5-3 
+0-6 
-41 
-1-9 
-0-8 
-0-8 
-0-9 
-1-9 
+ 07 
-1-6 
-0 2 
1839. 
+ 15 
+0-9 
-1-9 
-4-8 
-2-7 
+07 
-11 
-1-6 
-07 
-0-4 
+2-3 
+0-8 
1840. 
+ 3-3 
-01 
-3-3 
+2-1 
+0-9 
+ 1-5 
-3-3 
+ 1-6 
-22 
-2-5 
+ 10 
—5*5 
1841. 
— 21 
-2-9 
+5-3 
+ 1-5 
+4-2 
-1-6 
-35 
00 
+ 1-8 
-0-5 
+0-3 
+ 17 
1842. 
- 2-8 
+2-6 
+40 
-0-5 
+0-6 
+4-9 
-11 
+4-9 
+0-1 
-3-9 
+0-4 
+0-2 
1843. 
4- 4’2 
-2-2 
+2-0 
+ 1-4 
-0-4 
-17 
-0-4 
+ 1-6 
+3-2 
-1-3 
+ 1-4 
+5-1 
1844. 
+ 3-4 
-30 
+0-6 
+60 
+0-3 
+27 
+0-1 
-2-8 
+0-6 
+0-2 
+1-8 
—5*8 
1845. 
+ 2-6 
-5-5 
-5-7 
+06 
-3-2 
+27 
-1-5 
-3-2 
-27 
+0-9 
+3-4 
+2-9 
1846. 
+ 80 
+5-7 
+2-4 
+ 1-4 
+2-0 
+7-3 
+3-2 
+27 
+3-8 
+1-2 
+3-6 
—5*9 
1847. 
- 0-6 
-2-8 
+0-1 
-0-4 
+3-8 
00 
+4-1 
+ 1-6 
-20 
+3-6 
+4-5 
+40 
1848. 
- M 
+5-2 
+2-9 
-1-9 
+7-1 
+0-5 
+0-2 
-21 
-05 
+2-3 
+ 1-4 
+5'2 
1849. 
+ 4-4 
+5-0 
+ 1-6 
-2-5 
+ 1-4 
-01 
+0-8 
+2-4 
- f -2‘5 
+ 1-8 
+ 17 
+0-3 
The sign — denotes that the temperature of that montli was below the average, and the sign + denotes that it was above the average. 
