CLIMATE OF LONG ISLAND. 
21 
I am unable to account for the low mean temperature of Easthampton and Jamaica. 
In the former place it is less than is due to the latitude and elevation by 2°. 55, a greater 
difference than is found at any other place in the State. Nor is this diminished tempera¬ 
ture shown by the thermometer only. The backwardness of the spring at the east end of 
Long Island is still more remarkable. It appears by Table III. that contrary to what we 
should expect, fruit trees bloom there about a week later than they do in the interior of 
the State, and a fortnight later than at the west end of the island. This has been very 
nearly the uniform difference every year for seventeen years past. In fact, the spring is 
but very little earlier than it is on the Black river in Lewis and Jefferson counties. But 
notwithstanding the lateness of vegetation in the spring, agriculture does not appear to be 
so much retarded. Strawberries ripen, and the wheat harvest is commenced there earlier 
than the average of the State, though considerably later than at the west end of the island. 
Farther, the time lost by the lateness of the spring appears to be made up in the fall. 
With scarcely an exception for the past fifteen years, the first killing frost in autumn has 
occurred much later at Easthampton than at any other place in the State which has been 
reported. The average time has been a full month later than the average of the State, 
and nearly three weeks later than at Jamaica or Flatbush. 
II. THE VALLEY OF THE HUDSON. 
Localities observed. Mount-Pleasant, North-Salem. Goshen, Montgomery, Newburgh, Pough¬ 
keepsie, Kingston, Redhook, Hudson, Kinderhook, Albany, Lansingburgh, Cambridge, Salem, 
Granville.* 
TABLE I. Comparison between calculated and observed temperatures. 
LOCALITIES. 
Number of 
years 
observed. 
Latitude. 
Elevation. 
Temperature 
due to latitude 
and elevation. 
Observed 
temperature. 
Variation of 
observed from 
calculated 
temperature. 
Mount-Pleasant . 
n 
41° 09' 
125ft. 
50°. 30 
50°. 08 
— 0°.22 
North-Salem. 
n 
41 20 
170 
49.88 
48.01 
— 1.87 
Goshen. . 
8 
41 20 
425 
49.16 
47.59 ‘ 
— 1.57 
Montgomery. 
14 
41 32 
.... 
47.82 
Newburgh. 
13 
41 30 
150 
49.67 
49.16 
— 0.51 
Poughkeepsie . 
11 
41 41 
50f 
49.67 
50.74 
+ 1.07 
Kingston . 
14 
41 55 
188 
48.90 
49.46 
+ 0.55 
Redhook .. 
12 
42 02 
50f 
49.13 
48.81 
— 0.32 
Hudson . 
10 
42 15 
150 
48.47 
48.32 
— 0.15 
Kinderhook .. 
13 
42 22 
125 
47.35 
46.91 
— 0.44 
Albany . 
27 
42 39 
130 
47.89 
48.47 
+ 0.58 
Lansingburgh . 
16 
42 47 
30 
47.96 
48.17 
+ 0.21 
Cambridge . 
14 
43 01 
600f 
45.96 
45.39 
— 0.57 
Salem . 
5 
43 15 
600f 
45.59 
45.14 
— 0.45 
Granville . 
7 
43 20 
600f 
45.41 
46.03 
— 0.61 
t Elevation estimated. Granville and Salem very uncertain 
* I believe this place does not properly lie in the valley of the Hudson or its tributaries; but I could not con¬ 
veniently class it elsewhere. 
