( IV ) 



ON 



THE METEOROLOGY OF ENGLAND 



DURING 



THE QUARTER ENDING JUNE 30th, 1858. 

 By JAMES G L A I S H E E, Esq., F.E.S., 



SEC. OF THE BRITISH METEOKOLOGICAL SOCIETY. 



April. — Till the 14th the air Avas cold, being 4o-2 below the 

 average; from the 15th to the 26th it was warm, the average 

 excess being 5°"9 ; cold again to the end, 1°*0 below the average. 

 The mean temperature of the month was nearly of its average value. 



May was cold till the 15th, being 4^-1 below the average ; warm 

 till the 24th, averaging 10'2 in excess; from the 25th to the 28th 

 cold, being 2^-4 below the average ; then hot till the end, being 7°-G 

 in excess. The mean temperature of the month was about 1° lower 

 than the average. 



June Avas hot throughout, the average excess being above CP. 

 The mean temjierature of this month has been but once exceeded 

 since the 3'ear 1771, a period of 87 j^ears ; viz. in the year 1846, 

 when it was G5'=>'3. On the 16th of June, 1858, the temperature 

 near the sea rose as high as 88°, and between the latitudes 51° and 

 52^ reached 95°. The mean temperature of this day at Greenwich 

 was 76°-9 — the highest mean temperature in this month on record. 



The mean temperature of the dew-point was below its average in 

 April and May, and in June 3° above it. June was less humid than 

 tisTial, the average excess of air-temj^erature being greater than that 

 of dew-point temperature. 



The mean reading of the barometer was in defect in May, and 

 above the average in April and June ; the mean for June being the 

 highest during the last 1 7 j'ears. 



The fall of rain was in excess in April and May, and deficient in 

 June ; it was about the average for the quarter. 



Thunderstorms were very prevalent in June, some of them being 

 exceedingly violent ; particularly one on the 10th in the noiih-west 

 l^arts of iJorsetshire ; and one on the 1 6th at Eose Hill, near Oxford, 

 which was preceded by a violent hurricane ; the lightning flashed 

 14 times in about 30 seconds, and the thunder was incessant. 



The mean temperature of the air at Greenwich for the quarter 

 ending Ma}^, constituting the three s]"»ring months, was 46°'4, being 

 exactly of the average value. 



