96 



From this table it appears that the coldest month in the year has 

 occurred in January 22 times ; in February 10 times; in March once ; 

 and in December 8 times. 



The hottest month in the year has occurred in June 5 times ; in 

 July 26 times; in August 12 times; and in September once. 



The coldest month in the whole period occurred in January 1814, 

 the mean temperature being 26°*8. 



The hottest month during the whole period occurred in July 184'7j 

 the mean temperature being 68°'8. 



The means of all the differences between the hottest and coldest 

 month in every year is 27°'2 : the least difference occurred in 1828, 

 viz. 21°-3; the greatest difference in 1814, viz. S5°'0. 



3. The excess of the monthly mean temperature in every year, 

 above the temperature of the month from all the years. 



The means of the numbers in each column of this table, taken 

 without regard to sign, gives the variability of the temperature in 

 spring 2°*1 ; in summer 1°*7; in autumn 2°'0 ; in winter 3°*0. 



The greatest difference in the monthly means in spring is 11°*9 ; 

 in summer 12°'5 ; in autumn 13°*9; in winter 18°'S. 



The coldest year in this series was 1814, when the mean annual 

 temperature was only 45°*0: the hottest year was 1846, the mean 

 annual temperature being 51°*4. 



4. The mean temperature in every month in successive groups of 

 10 years, and for the whole year. 



5. The mean temperature in quarterly periods in successive groups 

 of 10 years. 



From this it is stated that the mean temperature of the Jst quarter 

 is 39°-5 ; of the 2nd, 53°-3 ; of the 3rd, 59°'S ; of the 4th, 44°'0. 



6. The mean temperature in spring, summer, autumn and winter, 

 in successive groups of 10 years. 



From this it is concluded that the mean temperature of spring is 

 4.7°-8; of summer 60°'0 ; of autumn 49°-9; of winter 38°1. 



Cold springs occurred in 1810, 12, 14, 16, 17, 37, 38, 39, 42, 45, 

 49 and 50; and the mean of the temperatures of these springs is 

 45°'5. The coldest spring was that of 1837, the mean temperature 

 being only 43°'3. 



Hot springs occurred in 1811, 15, 19, 22, 23, 27, 28, 30, 31 and 

 41 ; and the mean of the temperatures of these springs is 50°'4 : the 

 hottest spring was that of 1841, the mean temperature being as high 

 as 51°-4. 



Cold summers occurred in 1816, 17, 21, 23, 41, 43 and 49; and 

 the mean of the temperatures of these summers is 58°*0. The cold- 

 est summer was that of 1816, the mean temperature being only 

 57 '3. 



Hot summers occurred in the years 1818, 24, 26, 31, 46 and 47 ; 

 and the mean of the temperatures of these summers is 64'°"0. The 

 hottest summer was that of 1846, the mean temperature being as high 

 as 65°-0. 



Cold autumns occurred in the years 1814, 16, 20, 29, 36, 37, 38, 

 42, 44; 45, 49 and 50 ; and the mean of the temperatures of these 



