(11) 



ON 



THE METEOKOLOGY OF ENGLAND 



DUKING 



THE QUARTER ENDING SEPTEMUER 30, 1864. 

 By JAMES GLAISHEE, Esq., F.K.S., 



SEC. OF THE BBITISH METKOKOLOOICAL SOCIETY. 



For a period of 39 days preceding the close of the last quarter 

 there was an average daily deficiency of 2i° of temperature, and 

 the present quarter opened with a continuation of the same weather, 

 with somewhat increased intensity ; the deficiency of temperature 

 to the middle of July being as large as 3° daily on the average. 

 On the 17th July a warm period set in and continued for 25 days, 

 and the daily temperature was in excess to 3^°; this was succeeded 

 by 20 dajs of very cold weather, viz., from 9th August to 28th 

 August, whose average daily temperature was 4° in defect ; and it 

 is remarkable that this deficiency of temperature fell on the nights 

 only, the days were of their average warmth but the nights were 

 very cold, causing the extremes of temperature to range from great 

 heat by day to almost frost at night, and quite to frost on vegeta- 

 tion. A period of 12 days followed of warmth, the average daily 

 temperature being 2f° in excess ; then the 10 days from September 

 10th to 20th, the temperature of the air was daily 2° below the 

 average value, and the last 10 days of the quarter were in excess 

 to li° daily. 



The mean high day temperatures in the months of July, August, 

 and September were 75°-3, 72°-8, and 67°-3, being l°-7 above in 

 July, and of the same values as the average in August and Sep- 

 tember. 



The mean low night temperatures in the months of July, August, 

 and September were 51°-2, 48°-5, and 49°-l, being l°-7 below in 

 July, 4°-8 below in August, and 0°-3 above in September. 



The mean temperatures of the dew-point were 2°' I, 6°*3, and 

 l°-2 below their respective average. That in August was 47°-8. 

 The lowest before recorded was 51°-8 on two or three occasions. 



The fall of rain was in defect in July and August, and slightly 

 in excess in September. It was 0-3 in. in July, being 2-4 in. in 

 defect; 1-4 in. in August, being 1-0 in. deficient; and 2-8 in. in 

 September, being 0-4 in. in excess. 



The mean temperature of the air at Greenwich in the three 

 months ending August, constituting the three summer months, was 

 59°-6, being 0°-5 below the average of the preceding 93 years. 



