602 MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS TAKEN AT 
Table XXVIL — Showing the extreme readings of the thermometer in every year that 
self-registering thermometers were used at the Royal Society’s Apartments, and 
from the year 1840 to 1849 at the Royal Observatory, Greenwich. 
At the Apartments of the Royal Society. 
Year. 
Highest 
Lowest 
Difference 
Month and day of 
reading of 
he thermo- 
meter. 
reading of 
the thermo- 
meter. 
or range of 
reading in 
the year. 
1 
Highest readings. 
Lowest readings. 
1794. 
84-0 
22-0 
62-0 
On July 13. 
On January 10 . 
1795. 
81*5 
7-0 
74-5 
On May 23. 
On January 25. 
1796. 
80-0 
4-0 
76-4 
On June 26 and August 22. 
On December 25. 
1797. 
85-0 
24-5 
60-5 
On July 14. 
On February 28. 
1798. 
86-0 
11-0 
75-0 
On June 28. 
On December 29. 
1799. 
77-0 
17-0 
60-0 
On June 10, 30, July 6 and 8 . 
On December 31. 
1800. 
89-0 
18-0 
71*0 
On August 2. 
On January 1 . 
1801. 
80-0 
23-0 
57-0 
On June 29. 
On December 20 . 
1802. 
82-0 
15-0 
67-0 
On August 30. 
On January I 6 . 
1803. 
86-0 
19-0 
67-0 
On July 2. 
On January 26 and February 11 . 
1804. 
87-0 
19-0 
68-0 
On June 25. 
On December 24. 
1805. 
79-0 
23-0 
56-0 
On July 4, August 12 and Sept. 18. 
On February 2. 
1806. 
83*0 
26-0 
57-0 
On June 10. 
On March 13. 
I 8 O 7 . 
85-0 
23-0 
62-0 
On July 22. 
On January 15 and December 8 . 
1808. 
93-5 
18-0 
75-5 
On July 13. 
On January 22 and February 15. 
1809 . 
79-0 
20-0 
59-0 
On August 17* 
On January 18 and I 9 . 
1810. 
83-0 
14-0 
69-0 
On September 2. 
On January I 7 . 
1820. 
85-0 
20-0 
65-0 
On June 27- 
On January 5. 
1821. 
77*0 
25-0 
52-0 
On August 5, 6 , 22, 24 and 25. 
On January 2, 3 and February 27. 
1822. 
84-0 
23-0 
6 l -0 
On June 10 . 
On December 30. 
1823. 
78-0 
24-0 
49-0 
On August 13. 
On January 15. 
1824. 
81*0 
25-0 
56-0 
On July 13, 14 and September 1 . 
On January 14. 
1825. 
89-0 
26-0 
63-0 
On July 19 . 
On February 5. 
1826 . 
87-5 
l 6*0 
71-5 
On June 27- 
On January I 6 . 
1827 . 
81-1 
l 6-0 
65-1 
On July 29 . 
On January 3. 
1828 . 
78-7 
25*7 
53-0 
On July 3. 
On November 12 . 
1829 . 
77-8 
18-2 
59*6 
On June 3. 
On December 28. 
1830. 
85-8 
15-8 
70-0 
On July 30. 
On December 25. 
1831. 
80-8 
24-3 
56-5 
On July 29. 
On January 8 . 
1832. 
81*8 
27*8 
54-0 
On August 10. 
On January 5. 
1833. 
81-4 
27-3 
54-1 
On May 15. 
On January 23. 
1834. 
86-7 
29-2 
57-5 
On June 21 and July 17. 
On December 24. 
1835. 
84-2 
21-0 
63-2 
On July 28. 
On December 25. 
1836. 
85-2 
17-5 
67-7 
On July 4. 
On January 2 . 
1837. 
79-6 
24-0 
55*6 
On July 28. 
On January 2. 
1838. 
79-7 
11*4 
68-3 
On June 24. 
On January I 6 . 
1839. 
85-0 
23-7 
61-3 
On June 20. 
On January 30. 
1840. 
83-0 
21-2 
61-8 
On June 1. 
On December 18. 
1841. 
87-0 
14-9 
72-1 
On June 20. 
On January 9 . 
1842. 
87-0 
27-3 
59-7 
On August 11. 
On January 24. 
At the Royal Observatory, Greenwich. 
1841. 
82-8 
4-0 
78-8 
jOn May 27. 
On January 9* 
1842. 
90-5 
23-2 
67-3 
On August 10. 
On January 23. 
1843. 
89-8 
20-3 
69-5 
lOn July 6 . 
On February 15. 
1844. 
87-6 
18-8 
68-6 
On June 25. 
On January 3. 
1845. 
86-0 
7*7 
78-3 
On June 13. 
On February 11. 
1846. 
93'3 
18-8 
74-5 
On July 5. 
On December 14 and 30. 
1847. 
89-0 
10-2 
78-8 
On July 12. 
On February 1 1 . 
1848. 
85-3 
15-8 
69-5 
On July 14. 
On January 28. 
1849 
84-1 
18-8 
65-3 
On July 8 . 
On December 29. 
