On looking over this Table the first thing that strikes one 
the — sign 
ar 
blanl 
is ths 
the largest nnmbers are those generally under 
particularly so in the months of winter. There are 
in the Table, viz., February 1853, July and August 1860, and Octob< 
1831, showing, as before, that these are the only four months of oi 
temperature throughout, three being cold and one warm. 
By picking out under each month the largest number with a + sig 
and the largest number with a — sign, the extreme departures in eac 
month in 44 years will be shown, and are as follows: 
o 
In January the greatest excess on any one day was 16 - 0 in the 
year 
1828 
„ February „ „ 
16-9 
1831 
,, March „ „ 
14-7 
1826 
,, April ,, „ 
161 
1828 
„ May 
17-6 
1847 
„ June „ ,, 
167 
1858 
» July 
15-4 
1868 
,, August }> ,, 
14-5 
1842 
„ September ,, 
12-1 
1865 
„ October ,, 
11-9 
1831 
,, November ,, „ 
159 
1852 
,, December ,, 
13-9 
1856 
And 
In January the greatest deficiency on any 
O 
one day was 29'6 in the year 1838 
„ February ,, ,, 
22-4 
1855 
March „ 
22-3 
>> 
1845 
„ April ,, „ 
16-8 
?? 
1861 
„ May „ 
16-5 
M 
1867 
,, June „ 
27*2 
n 
1869 
>> July 
16-2 
» 
1856 
,, August 
12*1 
> > 
1867 
,, September ,, ,, 
12-1 
yy 
1860 
„ October „ ,, 
18-6 
; J 
1859 
,, November ,, „ 
21*5 
5J 
1858 
„ December „ 
20-5 
M 
1844 
In every month, with the exception of May and August, the extreib 
deficiency of temperature is larger than the extreme excess, and ve r 
largely so in many months. 
The greatest excess of temperature during the 44 years was 17°'; 
this took place on May 28,1847; and the greatest deficiency was 29°, 
on January 20, 1838. 
These extremes of temperature affect vegetation greatly, but tlr 
seldom occur alone ; it is very necessary for the operations of open-; ’ 
horticulturists to know for what lengthened periods these departure 
from averages may extend. By looking over Tables XVI. to XXVII.,- 
