Mr. J. Glaisher's Remarks on the Weather. 369 



latitudes of 53° and 54° was 17°'6 ; at Liverpool and White- 

 haven was 10°-3; and at Durham and Newcastle was 13°*3. 



The greatest mean daily ranges of the temperature of the air 

 took place at Hartwell, Cardington, Ilighfield House, Notts, 

 and Latimer Rectory ; and the least occurred at Torquay, 

 Guernsey, Liverpool, and Truro. 



The highest thermometer readings during the quarter were 

 91° at Wakefield; 87° at Chiswell Street, London; 86"-2 at 

 St. John's Wood ; 86° at Leicester. The lowest thermometer 

 readings were 29° at Beckington, 33° at Wakefield and at Lei- 

 cester, and 33°*8 atHighfield House, Notts. The extreme range 

 of temperature of the air during the quarter in England was 

 therefore about56°, considering the two extremes as 86°and 30°. 



Rain has fallen on the greatest number of days at Stony- 

 hurst, Highfield House, Notts, Wakefield and Stone. The 

 average number at these places was 51. It fell on the least 

 number of days at Southampton, Oxford, Beckington and 

 Greenwich, and the average number at these places was 29°. 

 The stations at which the largest falls have taken place are 

 Stonyhurst, Newcastle, Whitehaven and Helston. The 

 smallest falls occurred at Beckington, Wakefield, Holkham 

 and Norwich. The average fall in the counties of Corn- 

 wall and Devonshire was 9*8 inches ; south of latitude 52° 

 was 6-9 inches ; between the latitudes of 52° and 53° was 6*9 

 inches ; between 53° and 54° was 9*3 inches ; at Liverpool 

 and Whitehaven was 11*5 inches; and at Durham and New- 

 castle was 10*3 inches. 



The numbers in the columns 15 to 19 show the mean values 

 of the hygrometrical results; from which we find that — 



The mean weight of vapour in a cubic foot of air at all 

 places (excepting Cornwall and Devonshire) in the quarter 

 ending June 30, 1849, was 4*5 grains. 



The mean additional weight recjuired to saturate a cubic 

 foot of air in the quarter ending June 30, 1849, was 1*1 grain. 



The mean degree of humidity (complete saturation =1) 

 in the quarter ending June 30, 1849, was 0-802. 



The mean amount of vapour mixed with the air would have 

 produced water, if all had been precipitated at one time on the 

 surface of the earth, to the depth of h'5 inches. 



The mean weight of a cubic foot of air under the mean 

 pressure, temperature and humidity, was 526 grains at the 

 average height of 155 feet. 



And these values for Cornwall and Devonshire were 4*8 

 grains; 1*2 grain; 0*808; 6*0 inches; and 528 grains, at the 

 average height of 123 feet. 



The following table exhibits the meteorological particulars 

 of the first three quarters of the years 1847, 1848 and 1849. 



Phil, Mag, S. 3. Vol. 35. No. 237. Nov, 1849. 2 B 



