472 METEOEOLOGICAL KEPOBT, 1871, BY THE 



the 13th ; at Sunderland on the 17th. Hail fell at Sunderland 

 on the 8th ; at Acklam on the 8th. 



November. — 



"If the wind be in the south-west at Martinmas, it will keep there till 

 after Candlemas." — Midland Counties Proverb. 



Greenwich. — On the 2nd of November a period of cold wea- 

 ther set in of unprecedented length, continuing throughout the 

 whole month. The mean temperature of the month was 37*6°, 

 being 4J° below the average of 100 years, 5^-° below the mean 

 temperature of the fifty years ending 1863, and 6^° below the 

 average of the last thirty Novembers. 



Since the year 1771 the following are the instances of Novem- 

 bers with mean temperatures below 40°: — 



1773 39-2° 1809 39-5° 



1774 39-2° 1815 38-9° 



1780 39-5° 1816 39-3° 



1782 34-7° 1826 39-9° 



1786 36-7° 1829 39-3° 



1787 39-6° 1851 37-9° 



1789 ..'.... 38-7° 1858 39-6° 



1805 39-9° 1862 39-8° 



1807 38-7° 



So that in two instances only, viz., in the years 1782 and 

 1786 has the mean temperature been lower than 37'6° since 

 the year 1771, and since the year 1786 (85 years), there has 

 not been any instance of such a cold November. 



The mean temperature of October and November, taken toge- 

 ther, was 43 , 5 C ', and we must travel back to 1829 for a mean 

 temperature for these two months of so low a value, when it was 

 43-4°. In the year 1813 it was 43"7°, and in 1808, 43-6°, and 

 there were no other instances in the century of similar tempera- 

 ture. 



The mean high day temperatures and the mean low night 

 temperatures of November were lower than the average. 



The range of temperature was less than the average. The 

 rainfall was 1*8 inches in defect. 



