Mr. J. Glaisher's Remarks on the Weather. 375 



at Stone, and all depending upon them, are evidently erro- 

 neous. 



From the numbers in this quarter, as well as those of pre- 

 ceding quarters, it would seem that the Vale of Aylesbury is 

 subject to greater extremes of temperature than any other part 

 of the country of equal extent. 



The great mass of air has passed from the south-west in all 

 places except Liverpool and Whitehaven, at both of which 

 places it seems to have passed from the north-west. By refer- 

 ence to the Monthly Table, it will be seen that this was parti- 

 cularly the case in July and August; but in September the 

 direction of the wind was frequently from the east, and its 

 compounds. 



From the numbers in the ninth jcolumn, the distribution of 

 cloud seems to have been nearly the same in amount at most 

 places, and such as to have covered about three-fifths of the 

 whole sky. 



The fall of rain during the quarter has greatly exceeded the 

 average amount for the season, and this was particularly the case 

 in the month of August. The places at which rain has fallen 

 on the greatest number of days were Stonyhurst, Greenwich, 

 Beckington, Leeds, Highfield House, Helston and Wakefield, 

 and the average number of these places was 59 ; and the 

 places at which rain fell on the least number of days are those 

 situated near the eastern coast. The places at which the 

 largest falls have taken place were Stonyhurst, Hereford, 

 Beckington, Leeds and Torquay. The places where the falls 

 have been the least in amount are Durham, Newcastle, Saf- 

 fron Walden, Walworth, Stone and Norwich. The amount 

 at Stone being so much less than the fall at adjacent places, 

 seems to be strange; and this was the case in the preceding 

 quarter, in consequence of which the Rev. J. B. Reade, on 

 August 1 7, wrote to me, stating that u there had been many 

 electrical clouds giving copious showers around us, especially 

 on the Chiltern Hills and in the neighbourhood of Aylesbury, 

 while we were in sunshine. This was particularly the case 

 yesterday afternoon." 



The numbers in column 12 to 16 show 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 ah' for En- 

 gland (excepting Cornwall and Devonshire) in the quarter 

 ending September 30, 1848, was 4"5 grains. 



The mean additional weight required to saturate a cubic 

 foot of air in the quarter ending Sept. 30, 1848, was 1*0 grain. 



The mean degree of humidity (complete saturation =1) in 

 the quarter ending September 30, 1848, was 0*815. 



