ESTIMATION OF MEAN TEMPERATURE. 



17 



the difference would be material. At the equator, the mean meridian altitude of the sun, 

 instead of being 90°, is but 76° 20'; and at the pole, instead of being 0°, it is to be con- 

 sidered 13° 40% since aside from refraction the sun exerts no heating power when below 

 die horizon. In calculating the temperatures of Havana, Cumana and Quito, which lie 

 in the tonid zone, I corrected the formula as here suggested. 









■ 









PLACE 



ri 



IB 



o 



s i 



"2-D C w 



9 



■ 

 3 



OK 



OBSERVATION. 





< 

 > 



H 



■J 



Is 



1! a - - 



» 3 go 



O « a — 

 -j 2 » 



■3 a 



e * 





-1 



« 



s 



a-=<» 



cs 



S5-I 





57° OS' 



30ft. 



26° 42 



f26°51 



25° 46 







46 47 



340 



37.19 



38. 15 



41.50 



8 



Plattsburgh, New- York, 



■11 42 



105 



43.97 



44.73 



44.95 



2 



Cambridge, do 



43 01 



f600 



45.39 



47.22 



47.67 



14 



Lansingburgh, do 



42 47 



30 



48.17 



|s.2.'f 



48.05 



16 



Williams College, Mass. 



42 43 



800 



45.59 



|47.88 



48.16 



23 



Albany, New- York . . . 



42 39 



130 



48.27 



48.64 



l.s.26 



17 



Salem, Massachusetts . 



42 31 



50 



.|S. liS 



$48.82 



48.47 



33 



Kinderhook, New-York, 



42 22 



125 



46.91 



47.73 



48.71 



13 



Hudson, do 



42 15 



150 



48.29 



48.75 



48.90 



10 



Redhook, do 



42 02 



|50 



48.36 



is. 95 



49.27 



12 



Kingston, do 



41 55 



lss 



49.46 



50.97 



49.44 



14 



Poughkeepsie, do 



41 41 



t50 



51.65 



511. ss 



49.81 



11 



Newburgh, do 



41 30 



150 



4S.96 



49.59 



50.10 



13 



Newport, Rhode-Island, 



41 30 



30 



50.55 



|50.61 



50.10 



10 



Mount-Pleasant, N. Y. 



41 09 



125 



49 33 



5l 1 . 11 



50.66 



11 



Flatbush, Long island . 



40 37 



40 



51.25 



51.39 



51.53 



17 





39 56 



30 



53.42 



J53.51 



53.01 







39 06 



510 



53.78 



{55.24 



53.92 



S 



Washington, D. C. ... 



38 53 



30 



56.57 



56.66 



54.26 





Natchez, Mississippi . . 



31 28 



180 



64.76 



{65.27 



65.50 



8 





23 10 



30 



7s. Os 



$78.17 



76.39 



8 



Cumana, S. America . . 



10 27 



30 



SI. 86 



$81.95 



83.87 



S 



Quito, do 



13 



9510 



62.00 



•$83.73 



s.-i.ls | 





* Reduced by Humanities i 



bservatinns 













+ Height estimated. When 



a place is sa 



d to lie at the 



level of tide 



water, I have 



assumed the 



height 



of the instrument to be 50 fee 



t. 













J Mean temperature as obfif 



rved, reduce 



J to the level 



of the sea. 









Note The observed tempe 



rature of Nai 



i, Cincinnati 



Philadelphia 



, Natchez one 



Havana, wa 



taken 



from a table in the Biidgwat 



r Treatises ; 



th 't of Was 



lington and 



Vewpurl, frori 



i the meteorological 



register of the United Slates 



Army ; that 



of Quito, fro 



m Rees's Em 



yclopEedia ; a 



ud that of places in 



New-York State, from the R 



agents' Repor 



t 











After these preliminary investigations, I proceeded to examine the climate of the State, 

 in reference to the mean temperature, the extremes of heat and cold, the length and 

 forwardness of the seasons, and the progress of vegetation. 



In estimating the mean temperature of the several localities where observations had 

 been taken, I took it as given in the Regents' Reports for all places where the period 

 of observation amounted to ten years or more. For all others, I compared the mean tem- 

 perature on the years observed, with the mean for the State on the same years, and the 

 latter with its mean temperature for the whole seventeen years since the observations under 

 the instructions of the Regents were commenced. The mean of the observed temperatures 

 [Agricultural Report.] 3 



