( IV ) 

 ON 



THE METEOKOLOGY OF ENGLAND 



DURING 



THE QUARTER ENDING DECEMBER 31, 1864. 



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



8EC. OF THE BRITISH METEOROLOGICAL SOC'IETT. 



The "weather at the "beginning of the quarter was cold, and the 

 average deficiency of daily temperature amounted to 2°. From the 

 12th October to the 29th the period was warm; an excess of 

 temperature of 2|° on the average of those days took place. A 

 bitter cold period succeeded, continuing till the 12th November, 

 during which a daily deficiency was experienced of no less than 

 6i°. From the 13th November to the 13th December the weather 

 was generally warm, but there were cold periods of two and three 

 days together ; but upon the whole there was an excess of tempe- 

 rature averaging 2^° daily. From the 14th December to the end 

 of the quarter the weather was changeable. On the 17th the defi- 

 ciency of temperature was as large as 15|°, and on the 20th there 

 was an excess of 3°, followed again by a considerable deficiency, 

 which generally prevailed ; and the average defect of temperature 

 from the 14th to the end of the month was nearly 4° daily. 



The mean high day temperatures in the months of October, 

 November, and December were 68°*2, 48°-5, and 42°'5, being 

 0°*5, 0°"6, and 2°-8 respectively below their averages. 



The mean low night temperatures in the months of October, 

 November, and December were 44°-l, 35°-5, and 33°-7, being of the 

 same value as the average in October, and below their averages to 

 the amount of 2° in the remaining two months. 



The mean temperatures of the dew-point were 2°-7, 2°-l, and 2°-7 

 below their respective averages. 



The fall of rain was in defect to the amount of 1 '7 in. in October, 

 slightly above the average in November, and showed a deficiency of 

 1*3 in. in December. The amounts fallen were respectively 1*1 in., 

 2'6 in., and 0'6 in. 



The mean temperature of the air at Greenwich in the three 

 months ending November, constituting the three autumn months, 

 was 49°'8, being 0°'3 above the average of the preceding 93 years. 



