Mr. J. Glaisher"^s Remarks on the Weather. 373 



of 52°, including Chichester and Hartwell, is 41°'4 ; for those 

 places situated between the latitudesof 52° and 53°, including 

 Saffron Walden and Leicester, is 40°*7 ; for those places 

 situated between the latitudes of 53° and 54°, including Derby 

 and York, is 40^-2 ; and for Whitehaven, Durham and New- 

 castle is 40°'5. These values may be considered as those of 

 the mean temperatures of the air for those parallels of latitude 

 during the quarter ending March 31, 1849. 



The average daily range of temperature in Cornwall and 

 Devonshire was 10°'4; at Liverpool and Whitehaven was 

 6°*7; south of latitude 52° was 12°-6; between the latitudes of 

 52°and 54° was 1 1°'5; and at Durham and Newcastle was 1 1°'5. 

 The greatest mean daily ranges of the temperature of the air 

 took place at Hartwell, Aylesbury, and Latimer ; in fact, in 

 and near the vale of Aylesbury; and the least occurred at 

 Whitehaven, Liverpool and Guernsey. 



The highest thermometer readings during the quarter were 

 65° at Highfield House, 63°- 7 at Hartwell, and 63°-5 at La- 

 timer. The lowest thermometer readings were 10°"0 at Saf- 

 fron Walden, ll°-0 at Leeds, and 12°-0 at Hartwell. The 

 extreme range of temperature of the air during the quarter in 

 England was therefore about 55°, most likely somewhat less 

 than this value. 



The average quarterly range of the reading of the thermo- 

 meter in Cornwall and Devonshire was 28°* 1 ; at Liverpool 

 and Whitehaven was 33°*5; south of latitude 52° was 40°'3; 

 and north of 52° was 42°- 1. 



The mean temperature of the dew-point in Cornwall and 

 Devonshire was 41°-1 ; south of latitude 52° was 37°-6; be- 

 tween the latitudes of 52° and 53° was 36°-5, and north of 53° 

 was 37° 2. 



The direction of the wind has been mostly south-west ; at 

 some few places it seems to have prevailed for some time from 

 the north-west. 



From the numbers in the tenth column the distribution of 

 clouds has been such as to cover about three-fifths of the whole 

 sky. 



Rain has fallen on the greatest number of days at Wakefield, 

 Falmouth, Truro and Helston. The average number at these 

 places was 53. It fell on the least number of days at Oxford, 

 Saffron Walden, Durham and Leicester, and the average 

 number at these places was 35. The stations at which the 

 largest falls have taken place were Stonyhurst, Falmouth, 

 Whitehaven and Leeds. The falls were smallest in amount 

 at Durham particularly, York, Holkham and Oxford. The 

 average fall in the counties of Cornwall and Devonshire was 

 7*2 inches; south of latitude 52° was 5'1 inches; between 



