( XII ) 



ox 

 THE METEOEOLOGY OF ENGLAND 



DURING 

 THE QUARTER ENDING DECEAIBER 3 1st, 1858. 



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



SEC. OF TnE EniTISH METEOKOIOGICAL EOCIETT. 



October till the 4t]i was warm, lieing 3i° above tlie average ; cold 

 till the 12th, being 2f° deficient ; from the 13th to the 28th warm, 

 being 3i° in excess ; and then till the end of the month cold, the 

 mean daily deficiency being o^o. The mean temperature of the 

 month was 50^*8, being 1^° above the average. 



November was very cold till the 24th, being 6° below the average, 

 and then became warm for the remainder of the month, the average 

 excess lieing 5J^. The mean temperature of the month was 39°-0, 

 being 4^° below the average of the last 17 years. The mean tem- 

 perature of this month has been lower on 1 2 occasions only during 

 the last 87 years. The mean temperature of the 23rd and 24th at 

 Greenwich was lower than that of any two consecutive days in 

 November during the last 45 years. 



December was warm till the oth, being 3J^ in excess ; cold till 

 the 17th, averaging 3i° in defect; and for the remainder of the 

 month warm, the average excess being 5i°. The mean temperature 

 for the month was ^'^ above the average of the previous 1 7 years. 



The mean temperatiu-e of the dew-point was above its average in 

 October and December, and below in November. The mean degree 

 of humidity exceeded its average in December, but was deficient in 

 October and November. 



The fall of rain was deficient in each month, and the total 

 deficiency for the quarter amounted to 4-.5 inches. The annual fall 

 for the last four years has shown a yearly decrease ; in 1855 the 

 amoimt was 23-5 inches ; in 185G, 21-5 inches ; in 1857, 21*4 inches ; 

 and in 1858, 17'2 inches ; and the latter amount is the lowest since 

 1840, when it was 16-4 inches. 



The mean pressure of the atmosphere was considerably above 

 the average in October, and somewhat below in November and 

 December. 



The mean temperature of the air at Greenwich for the quarter 

 ending November, constituting the tlirec autumnal months, was 

 500-2, being O^'O above the average of 87 years. 



