PHILOSOPHICAL SOCIETY OF WASHINGTON. 



123 



Such results have beeu determined for the United States east of 

 the 97th meridian for each month since July, 1873. (These were 

 exhibited graphically before the Society.) We find a singular re- 

 sult on comparing these figures with similar figures for the single 

 station of Providence, R. L, (observations at this station, from 1832 

 to 1876, were kindly furnished the author by the Smithsonian Insti- 

 tution,) namely, a striking uniformity in the values; and we may 

 conclude that, as far as mean monthly temperatures are concerned, 

 we may consider those at any one station fairly comparable with 

 the same over an extensive res-ion. 



In the accompanying table each summer, and the following win- 

 ter, at Providence, R. I., have been considered as cold, cool, mean, 

 warm, or hot; and an effort has been made to establish the character 

 of the winter that follows a summer having any one of the above 

 characteristics : 



Year. Summer. Winter fol- 



lowing. 



1832 cold warm 



1833 cool warm 



1834 warm cold 



1835 mean cold 



1S36 cold cold 



1837 cold mean 



1838 hot cold 



1839 mean cool 



1840 warm mean 



1841 mean hot 



1842 mean mean 



1843 mean mean 



1844 mean warm 



1845 cool cool 



1846 cold_ hot 



1847 mean hot 



1848 warm cool 



1S49 mean hot 



1850 mean hot 



1851 mean cool 



1852 warm warm 



1853 warm cool 



1854 warm cool 



1855 hot cold 



1856 hot cold 



Year. Summer. Winter fol- 



lowing. 



1857 cold hot 



1858 cold hot 



1859 mean hot 



i860 cool hot 



1861 cool warm 



1862 cold warm 



1S63 cold hot 



1S64 cold warm 



1S65 mean hot 



1S66 warm warm 



1S67 mean mean 



1868 mean cold 



1869 cool warm 



1870 hot hot 



1871 mean cold 



1872 hot cold 



1873 mean mean 



1S74 mean cold 



1S75 co 'd mean 



1S76 warm cold 



1S77 warm hot 



1878 warm cool 



1879 mean hot 



1880 hot cold 



1881 warm hot 



