156 Meteorological Results. 
The annual mean temperature of the past vear is fifty-one ae. 
grees ; being about two degrees above the average : the mean of 
the first three months, 40°9 ; second 54°1; third, 61°9; fourth, 
48°; of the six winter paiaiibdig 44°4 5 six cave te months, 57° 9. 
The maximum, or hottest state of the year was 81°, which oc- 
curred on the memorable 19th of July, the Coronation of King 
George the Fourth ; the minimum or coldest state was 23°, which 
is only 9 below freezing; this happened on the 4th January, 
making an annual variation of 58°. From the above, the reporter 
is enabled to draw the following comparison between the past 
and preceding year, viz. the average heat of the six summer 
months of 1821 was nearly one degree more than that of 1820, 
and the heat of the six winter months three degrees above the 
corresponding ones of the preceding year; so that the temperature 
of 1821 has been more mild than usual, and not marked by any 
very great extremes. 
The annual mean elevation of the barometer is nearly twenty- 
nine inches and seven-tenths; highest 36°65, which was on the 
23rd of January; lowest 28-16, which happened on the 28th of 
December : the difference of these extremes makes 2°49 inches : 
mean of the six summer months 29-75 ; of the six winter months 
29°63. The mean daily movements of the barometrical surface 
measure nearly forty-eight inches: total number of changes oue 
hundred and five. The barometer throughout the month of 
February was remarkably high and desultory in its movements : 
on the contrary, in the mouth of December it oscillated most éx- 
traordinarily ; and towards the close of the year very low; the 
utmost depression was the minimum of the year. 
Much has heen said about the wetness of the past year. My 
annual account scarcely amounts to 32 inches in depth, which is 
certainly under the average for Manchester. Mr. John Blackwall 
of Crumpsall, makes his ‘anual fall three inches more ; and Mr. 
John Dalton, for Ardwick, nearly eight inches more than mine. 
On the contrary, Mr. Edward Steifox of Lymm near Warrington, 
has only registered a fall of twenty-eight inches. The differences 
in our annual statements of rain [rom places so near together are 
singular, and certainly require an attentive inquiry. The only 
difference in eur apparatus is, that Mr. Dalton’s rain funnel is 
larger ; mine, Mr. Blackwall'’s, and Mr. Stelfox’s are made alike, 
the same size, and of one material, which is that of copper. Pro- 
vided our calculations of the method of measuring the rain col- 
lected in these funnel-areas be correct, and which I have every 
reason to conclude is the case ; and provided their surfaces are 
parallel with the horizon, and at sufficient distances from trees, 
buildings, or any object that might obstruct a free access, it must 
fullow that there can be no error in our results, I have — 
own 
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