50 
Table II. 
Difference between the Mea.n Temperature of each Month, and 
the Average of the same Month for Twenty Years. 
Year. 
Jan. 
Feb. 
March 
April. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
O 
o 
o 
o 
O 
o 
o 
o 
o 
O 
o 
o 
1849 
4-2-0 
00 
—1-9 
4-1-6 
—1-2 
—0-7 
4-0-2 
-j-0"8 
4 -i-o 
—1-2 
—0-6 
4-2-7 
4-3-7 
—1-8 
1850 
—3-4 
4-5-9 
4-2-1 
4-1-6 
—3-1 
—0-9 
1851 
•4-3-6 
-j-1-2 
-f-i-7 
—1-0 
—1-4 
—1-5 
4-2-8 
—5-6 
4-0-3 
1852 
4-2-2 
4-1-8 
4-0-3 
4-1-4 
4-i-o 
4-1-6 
4-8-3 
—0-8 
—4-1 
4-3-8 
4-4-8 
1853 
4-2-8 
— 5-4 
— 2-6 
—l-o 
— 01 
4~T6 
—TO 
—1-0 
4-0-5 
-5-2 
1854 
—0-1 
+0-8 
4-3-2 
4-2-8 
4-0-6 
4 -o-i 
4-0-7 
4-2-1 
—1-7 
—0-9 
—0-6 
1855 
—IT 
— 9 - 6 
—2-6 
—0-5 
—3-2 
-1-0-1 
4-2-2 
—0-2 
—0-2 
4-0-3 
—4-8 
1856 
—0-1 
4-2-9 
4-0-3 
4"0"6 
—1-5 
—1-3 
—0-9 
—0-9 
4-3-1 
—2-0 
—1-9 
1857 
—1-3 
4-i-i 
4-i-o 
—02 
4-io 
4“4"2 
4-i-o 
4-4-2 
4 — 2"6 
4-3-3 
— | — 2*6 
4-4-8 
1858 
4-o-i 
-2-9 
—0-2 
—0-2 
-1-8 
4-6-3 
—1-7 
4-3-0 
-j-4'1 
—0-5 
—2-0 
-j-0-4 
1859 
_i_3-3 
4-2-9 
4-4-0 
—1-4 
4-2-6 
4-3-2 
4-4-7 
4-o-i 
—0-2 
—1-6 
—6-3 
1860 
lo-i 
—3-7 
—TO 
—2-2 
4-2-8 
_l-8 
—2.0 
—3-4 
—01 
— 1-2 
—5-9 
1861 
_2-8 
4-1-8 
— | — 2*2 
—2-2 
—2-4 
—0-4 
—0-3 
4 -o-i 
4-4*1 
—3-2 
—0-9 
1862 
4-0-3 
4-2-8 
4-1-2 
—5-4 
—3-9 
—9-0 
—2-9 
—0-7 
—0-4 
4-0-4 
— 4*4 
4-2-6 
1863 
4-4"6 
4-3-6 
4-3-0 
4-1-0 
—0-8 
o-o 
-81 
-6-3 
—7-4 
4-0-2 
4~3"8 
4-2-5 
1864 
—2-2 
—3-0 
—2-0 
+T7 
4-2-5 
—1-0 
-1-3 
—3-1 
—0-44-0-3 
4-1-8 
4-8-1 
1865 
—2-8 
—2-7 
—4-3 
4-3-9 
4-2-2 
4 - 2 - 8 ; 4 - 2 -o 
— 0"6 
4 — 5*8 -j-0’3 
4-1-9 
4-1-5 
1866 
4-1-9 
—3-5 
—5-3 
4-0-7 
—2-8 
4-2-6 
—2-6 
—1-2 
_ 1-3I4-0-3 
4-2-5 
4-1-2 
1867 
—46 
4-1-7 
—3-6 
4-2T 
4-l'6 
—0-4 
—1-2 
4-1-8 
4-1-1 
— TO 
—25 
—2-0 
1868 
4-1-1 
4-4-6 
4-3-0 
—0-4 
-j-3-6 
4-0-5 
4-3-7 
-1-2-6 
4-2-5 
—2-1 
—0-4 
4-3-7 
Means. 
_2 a -\ 
2-02 
3-26 
217 
1-67 
1-91 
2-06 
2-35 
2-61 
1-89 
1-50 
2-37 
301 
’■J3 -2 / 
03 -t-3 ( 
rb 03 y 
O -g ( 
£ s3 \ 
P8 > J 
1-80 
3-05 
1-93 
1-49 
1-70 
1-84 
2-09 
2-48 
1-68 
1-33 
2-11 
2-68 
