Barometric Observations. 73 
P. S. Upon a hasty observation of the winds that have pre- 
vailed in different months, with reference to the greatest discre- 
pancies, such as Crumpsall and Leighton in June and August, 
Manchester and Leighton in April aud June, &c. &c, these 
winds appear to me to have been always from opposite quarters. 
Your correspondents will be able to appreciate the probable ef- 
fects of the variation of the wind at their respective stations. 
The following Barometrical Observations for 1521, taken at 
10 o’clock daily, were made by Mr.R. Wesstrer, Cornhill, 
London, 
Inches. Inches. 
January . 30-229032 | July .. 29:942193 
Maximum... 30:95 Maximum ., 3()225 
Minimum .. 29-125 Minimum .. 29:65 
February .. .. 30°21160 | August .. 29:937096 
Maximum... 30°65 Maximum,.. 30:15 
Minimum... 29°35 Minimum .. 29°55 
March 29°679932 | September., .. 29-8425 
Maximum... 30°50 Maximum... 30-20 
Minimum .. 29°15 Minimum .. 29:45 
April... =... +=-29°655833 | October .. 2. 29:901774 
Maximum... 30°05 Maximum... 30°255 
Minimum .. 29°35 Minimum .. 25:20 
May. 3s .. 2%:866935 | November .. 29°830833 
Maximum,.. 30°20 Maximum... 38():25 
Minimum .. 29:25 Minimum ., 29°35 
June 4 pate ha December -. 28°880 
Maximum... 30°25 Maximum... 380-20 
Minimum .. 29°65 H Minimum .. 28°35 
The mean atmospheric pressure of the whole year — 29833236 
The maximum of the year ..  .. oe oe e+ 30°95 
The minimum of the year ..  .. «2 ee ee =628'35 
The barometrical range ER Gaede \ ich 0: PS O26 
The elevation of the place of observation (as measured by a 
capital mountain barometer by Mr. Jones, taken at the mean of 
several observations,) at 60 feet above the level of the sea; the 
latitude at 51 deg. 830 min. 88 sec. North; the radius of the 
earth considered 3954°590 miles. 
N. B. The elevation is particularly given, as the force of 
gravity increases inversely as the square of the distance from the 
earth’s centre, 
Vol. 59, No, 285, Jan, 1822, K Re- 
