Royal Society,^ 5j$^ 



Sa^-G; June 58°-7 ; July 61°-i ; August ^05^2 ; September^ 5S'':6i 

 October 50°-0 ; November 42°-9 ; December 39°-l. lir bn; 



2. The highest and lowest monthly mean temperature in^^everv 

 ar, from 1810 to 1850, wM the Mount <^ $#6^600^ Vfifiin- 



year 



perature. ' , 



"^,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. -'->."ii^qiHoa vloiu-ju'^:)); x.i iiljioiis .boiiqcp 



The hottest month in the j'^ar has'ddcni'red in J«nfe'5<tiraefe^ii» 

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



The coldest month in the whole pefiiod fOCQ^rred i«:Ja»u^iryii8Wb'i 

 the mean temperature being 26°-8. ..-n^y'iotiii teofii r iri>>fti^ hhuri^ 



The hottest month during the whol^g^i(^^C5:|i^/jffd.j^J}^Ijyff^ 

 the mean temperature being 68°-8. ,\. ,j,^,^,^, f,,,,. k,.,.,.^ -f.,^^,,,' j.,,,,.,yi 



The means of all the differences between the hottest ^and'cdlaest 

 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 l°-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°'3. 

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

 temperature was only45°*0; the hottest ye^r.yy^as, l§i6^.^e m§an 

 annual temperature being 51°-4. ;^^j Ha'«ot [rl/s^/ha vd 



4. The mean temperature in every month iii|83|C'c^ai^ei^^j||^I 

 10 years, and for the whole year. , 'tiit to ioyjdo .'>dr ' 



5. The mean temperature, |fiiq\ia^|€^^^pf,^i(^4^^q^^yf^^^^ 



of 10 years. uH.-ih r»(i .tn .-muM aoiiv-)J in ..fwf rrn .^ 



.jjFrom this it is stated that the mean temperature of the 1st quarter 

 jg 39°-5 ; of the 2nd, 53°*3 ; of the 3rd, 59°-3 ; of the 4th, 44°-0. 

 ..V 6. The mean temperature in spring, ^^mm^Yi ^^f^TO i^9A)^^ft('f F? 

 in. successive groups of 10 years. ,» .,;,), Iwin .fnnd>;(Tftto/ .vrrrrrf 



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

 47°-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 meft^. temperature 

 being only 43°-3. 



Hot springs occurred in 181 1, 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 

 as51°-4. 



^y.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. 

 v^lHot summers occurred in the years 1818, 24, 26, 31, 46 and 47; 



