CLIMATE OF LONG ISLAND. 



21 



I am unable to account for the low mean temperature of Easthanipton 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 Easthanipton 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, Newburgb. Pough- 

 keepsie, Kingston, Redhook. Hudson. Kinderhook, Albany, Lansingburgh, Cambridge, Salem, 

 Granville.* 



TABLE I. Comparison betwan calculated an J observed temperatures. 



LOCALITIES. 



Mount-Pleasant 

 North-Salem . . . 



Goshen 



Montgomery . . . 



Newburgb. 



Poughkeepsie . . 



Kingston 



Redhook 



Hudson 



Kinderhook . . . , 



Albany 



Lansingburgh 

 Cambridge .... 



Salem , 



Granville 



years 

 observed. 



Latitude. 



11 

 11 

 8 

 14 

 13 

 11 

 14 

 12 

 10 

 13 

 27 

 16 

 14 

 5 

 7 



41 o 09• 

 41 20 

 41 20 

 41 32 

 41 30 

 41 41 



41 55 



42 02 

 42 15 

 42 22 

 42 39 



42 47 



43 01 

 43 15 

 4:j 20 



Temperature 

 due to latitude 

 and elevation. 



125a 



no 



425 



150 

 50f 



188 

 50f 

 150 



125 



130 



30 



,;,,,,- 



roof 

 roof 



50°.30 



i'.'.— 

 49.16 



*49.67 

 49.67 

 48.90 



49.13 

 4S.47 

 47.35 

 17.49 

 47.96 

 45.96 

 45.59 

 45.41 



Observed 



temperature. 



50°.0S 

 48.01 

 47.59 

 17.82 

 49.16 

 50.74 

 19. 16 

 4S.M 



46.91 

 48.41 

 4S.17 

 45.39 

 45.14 

 46.03 



Variation of 



observed from 



calculated 

 temperature 



— 0°.22 



— 1.87 



— 1.57 



— 0.51 

 + 1.07 

 -)- 0.55 



— 0.32 



— 0.15 



— 0.44 

 + 0.58 

 + 0.21 



— 0.57 



— 0.45 



— 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. 

 venientlv class it elsewhere. 



