588 MR. GLAISHER ON THE THERMOMETRICAL OBSERVATIONS TAKEN AT 
1793. — January and February and beginning of March were mild ; a frost set in 
at the end of March ; there was a great fall of snow in the first week in April. The 
former part of the summer was cold, with frequent frosty mornings till June; July 
was wet ; the autumn was fine, mild and calm, and there was no frost till the end of 
the year. 
1794. — The year began with slight frost, which continued till the end of January; 
February was very mild; the spring was warm till May, which was cold ; July was 
hot ; the autumn was wet but mild, as was the first part of December, but the wea- 
ther during the latter half of the month was severe with heavy snow. 
1795. — The frost began about the middle of December 1794, was excessively severe 
in January, and continued till the end of March. There were very large falls of snow, 
and the consequent floods were so great that nearly all the bridges in England were 
injured. Some snow fell in April. The summer was cold, with frequent frosty morn- 
ings till June ; there were some hot days in July, but it was generally cold ; after this 
the weather was fine till autumn. In December much injury was done to shipping 
by the strong S. and S.W. winds ; there was no frost. 
1796. — January was remarkably warm, u^ith occasional thunder-storms; there was 
no frost till March, and then of no long duration. The summer was cool ; the autumn 
was fine with a few frosty mornings at the end of November ; in December a severe 
frost set in, and the reading of the thermometer in many places on the 24th was 
below zero of Fahrenheit’s scale. 
1797. — During a few days in January the frost continued; after this, till the end of 
March, scarcely any rain fell, and the weather was fine with frequent frost. From 
April to September there were frequent heavy rains. The summer was cold ; there 
was some warm weather in July; the autumn in general fine, and the weather con- 
tinued open till the end of the year. 
1798. — With the exception of a few slight frosts, which occasionally occurred till 
March, the weather was open and mild. The summer was fine, as was autumn and 
the beginning of December ; after this a very severe frost set in, and the reading of the 
thermometer was as low as 5°. 
1799. — The severe frost which set in about the middle of the preceding month 
continued to the middle of January, and again set in towards the end of the month 
with much snow, which continued during the first week in February ; some snow 
fell in March, and the mornings were frosty till the end of the month. From April 
to the middle of November was wet ; December was foggy ; and after the 17th a severe 
frost set in with snow falling. The whole year was remarkably cloudy. 
If we compare the character of the preceding years with the abnormal differences 
shown for the same years in Table XX., the agreement is most satisfactory, and leaves 
no doubt upon the correctness of the numbers at the beginning of this series. I do 
not think it necessary to describe the years from that of 1800, as most of them are 
well described by Luke Howard in his ‘Climate of London.’ 
