RESULTS OF METEOROLOGICAL OBSERVATIONS. 



219 



Tablb IV : Amount of Variation of extreme cold in the winter months, and in 



March of each year. 







1 



^ J 







^ -• 







1 



o-S 







oM 







Zero 









Zero . *« a 









^ >» 



^ o 







>i -^ 9 







or 



O T3 



„ a 







«r |l^' sj 



Date. 





below. 





Date. 





below. :§= J§ 







r 



t-l <» 







i H © 



1837 January . . 



2 



— 4° 



d 





1852 January . . 



8 



— 2^ 









3 



— 3 





4 



, , 



20 



— 8 





2 



February . 



13 



— 2 







1853 January . . 



26 









1 





18 



— 4 





2 



1854 December. 



19 



— 5 







1838 March . . . 



2 



— 3 









20 



— 3 





2 





3 



— I 





2 



1855 February . 



6 



—20 



d 





1839 January . . 



1 



— 1 









7 



—20 





4 



.. 



23 



— 4 







1856 January . . 



8 



— 2 







• • 



24 



— 2 



d 



5 



. , 



9 



— 8 



d 





February . 



1 









1 





26 









5 



1840 January . . 



3 



— 3 







February . 



3 



— 3 







•• 



4 

 16 



— 2 



— 3 







•• 



6 

 12 



— 1 











, . 



17 



— 2 





4 



, , 



13 



— 6 







1841 January . . 



3 



— 1 







, , 



14 



— 8 







. , 



4 



— 4 









15 



— 7 





8 





18 









3 



March . . . 



9 



— 5 







February . 



12 









1 



, . 



10 



— 4 





3 



March . . . 



17 



— 6 





I 



1857 January . . 



16 



-3 





1842 Not below. 











. , 



18 



—16 d 





1843 February . 



17 











, , 



22 



— 6 







, . 



18 



— 3 





2 



, , 



23 



— 8 







1844 January . . 



27 



— 1 







, , 



24 



-3 









28 









2 



, , 



26 



— 5 





10 



1845 January . . 



19 



— 1 





1 



1858 February . 



24 



- 2 





1 



1846 February . 



19 



— 3 





1 



1859 January . . 



9 



— 6 







1847 February . 



23 



— 2 









10 



—10 



d 



4 



, , 



24 



— 2 







December. 



28 











, , 



26 



— 1 





3 



, , 



29 



- 6 





2 



1848 January . . 



10 











1860 February . 



3 



— 4 





1 





11 



— 2 



2 



December. 



15 



— I 





1 



1849 January .. 



9 



—12 



1 



1861 February . 



7 



—12 







February . 



13 

 16 



— 1 



— 5 





1862 Not below. 



8 



—11 





2 



, . 



17 



— 5 





4 



1863 February . 



4 



— 6 





2 



1850 December. 



13 



— 1 







1864 January . . 



1 



— 1 







. , 



31 



— 4 





2 





2 



— 4 





2 



1851 January . . 



30 



— 6 







February . 



17 



— 1 







December- 



16 



- 2 







, . 



18 



— 2 







. . 



17 



— 1 





, , 



19 



— 2 





3 



, , 



26 



— 6 















.. 



27 



— 6 



4 







■ ; 1 



On this Table it is seen tliat the observations, for twenty-eight years, at 

 or below zero, were in January 47, in February 35, in December 11, and 

 in March 6, equal to 99 ; and the sum of the three daily observations in 

 these four months is 3395, and the proportion is = uff-5 = iri iiearly : that 

 the proportion for January is //g^ = yW, for February y^/y = J^, for Decem- 

 ber ^y^ = y\, and for March is ^f g^ =z -j^-^. March is rarely down to zero : 

 December, nearly twice as many times. Near a week of severe weather in 

 January 1857 must give a low average ; and turning to a previous table, we 

 see that the mean of the last of January 1857 was only thirteen degrees. 

 The coldest was in 1855, or 20 degrees below zero at evening and next 

 morning observations, in February, at the hours of observation ; and at 3| 

 a.m., 25° below. The mark d means that the temperature was all day below 

 zero : only six instances in the twenty-eight years. 



