Jor the Thermometer. '42$ 



poles, (as in latitudes at some distance from the equator,)- 

 the temperature may be nearly or quite the same as at the 

 poles : thus, at Albany Fort, Hudson's Bay, N. latitude 32, 

 W. longitude 82, the thermometer has sunk to —50, which 

 is the greatest degree oF natural cold ever observed; and 

 is within eighteen degrees of that which I i^ve esiimated 

 io he the greatest natural cold, . •! , 



Table T. 

 A Table of the Temperattires of different Latitudes, 



Notabene, — A is the latitude, in tenths of degrees, from 

 the equator to the pole. 



B is Kirwan*s table of the mean annual temperature of 

 -each latitude in A : the heat increasing, but hi a diminish' 

 ingratio^ from the middle latitude, viz. 45, the mean an- 

 nual iempefi'ature of which is 57*5 to the equator; and the 

 <:old increasing, but in a diminishing ratio, fjom latitude 

 45 to the pole. 



C is Kirwan's table B xeduce^ to the nearest whole 

 ai umbers. 



D is the greatest cold of each .latitude A, deduced bv 

 subtracting the number iu d, from the parallel number ia 

 C, up to latitude 40, and from thence up to latitude 90, 

 subtracting the number in C from the number in d; the 

 first producing the plus degrees^ and the latter the minus 

 .degrees. 



£ is the greatest heat in the shade of each latitude A, 

 D d 4 deduced 



