Mr. J. Glaisher's Remarks on the Weather'. 1 95 



adjacent localities have estimated it differently. At all places 

 its strength seems to have been unusually small. 



From the numbers in the ninth column, the distribution of 

 cloud seems to have been the same at all places, and such as 

 to cover about one-half of the sky. This value is much less 

 than the average amount of cloud. 



The fall of rain during the quarter has greatly exceeded the 

 average amount for the season. The amount in May was 

 much below the average for that month. In the months of 

 April and June the amount was unusually large, particularly 

 in the latter month. The places at which rain fell on the 

 greatest number of days were Leeds, Nottingham, Stonyhurst, 

 Saffron Waklen, &c. ; and on the smallest number of days 

 were Thwaite, Scarva, Helston, Newcastle, &c. The places 

 at which the largest falls have taken place were Hereford, 

 Stonyhurst, Southampton, York, Leeds, Wakefield, &c. ; 

 and the places where the falls have been the least in amount, 

 are Saffron Walden, Cambridge, Newcastle, Stone, &c. ; but 

 it would seem that the amount at the last-mentioned place is 

 wrong (see the amounts at Hartwell and Aylesbury). Ge- 

 nerally the largest falls have been in Yorkshire, and the small- 

 est in the counties north of Yorkshire. 



The numbers in column 12 to 16 contain the mean values 

 of the hygrometrical results at every station ; from which we 

 find that — 



The mean weight of vapour in a cubic foot of air for En- 

 gland (excepting Cornwall and Devonshire) in the quarter 

 ending June 30, 1848, was 3*8 grains. 



The mean additional weight required to saturate a cubic 

 foot of air in the quarter ending June 30, 1848, was 1*1 grain. 



The mean degree of humidity in the quarter ending June 30, 

 1848, was 0-778. 



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 4*6 inches. 



The mean weight of a cubic foot of air at the level of the 

 sea, under the mean temperature, humidity and pressure, was 

 534 grains. 



And these values for Cornwall and Devonshire were 3*8 

 grains ; 1*2 grain ; 0*765 ; 4*7 inches ; and 534 grains respect- 

 ively. 



The results from the station in Ireland agree very closely 

 with those in England in the same parallel of latitude, except- 

 ing those depending on the water mixed with the air, and in 

 these respects an excess of humidity is shown at this station. 



