By the preceding observations it is 49.04 ; but it must be recol- 

 lected that the results of several very intense winters enter into the 

 elements from which it is deduced. 



The temperature of wells, as observed in August and Septem- 

 ber, 1829, was 51°. 



As it may be interesting, I add the results obtained in places of 

 nearly the same latitude with Albany. The late Dr. Holyoke, of 

 Salem, made observations in that town during a period of 33 years, 

 (from 1786 to 1818 inclusive.) 



♦Latitude of Salem, 42.31 N. 



Longitude of do 76.53. 



Mean temperature deduced as above, 48°68. 



Greatest range, 112. 



Hottest, 101. 



Coldest, —11. 



Mean of winter, 27.502. 



do spring, 46.05. 



do summer, 69.84. 



do autumn, 51.308. 



These observations were made four times a day, at 8 A. M., at 

 noon, at sunset, and at 10 P. M. 



Professor Dewey made meteorological observations at Williams- 

 town, (Mass.) for four years, 1816 to 1819 inclusive. 

 Latitude, 42.30. 

 Longitude, 73.00. 



Mean temperature for four years, 44°73. 

 Height of Williamstown above the tide waters of the Hudson at 

 Troy, 1000 feet.t 



Height of Albany only 130 feet. 



t Memoirs of the American Academy of Arts and Sciences, vol. 1, page* 382, 307. 



