OF THE GLOBE. 21 1 



Asia. In the three first columns of the following Table, he 

 has given the differences of temperature for the Eastern and 

 Western Hemispheres, under the parallels of 30°, 40°, 50° and 

 60° of north latitude. 





Temp. 



Temp. 



Difference 



Temp, of 



Diff. be- 



Lat. 



Old World. 



New World. 



between Old 



N. World 



tween obs, 









and N. World. 



calculated. 



& calcul. 



so 9 



70°.52 



66°.92 



3°.60 



69°.07 



+ 2°.15 



40 



63.14 



54.50 



8.64 



54.04 



— 0.46 



50 



50.90 



37.94 



12.96 



38.06 



+ 0.12 



60 



40.64 



23.72 



16.92 



23.02 



— 0.70 



The difference of temperature of the Old and New World is 

 nearly 4° in the parallel of 30° ; 9° in the parallel of 40° j 13° 

 in the parallel of 50° ; arid 17° in the parallel of 60°. 



It would have been desireable to have expressed these dif- 

 ferences, by adding to the preceding formula a co-efficient de- 

 pending on the longitude ; but the observations are not suffi- 

 ciently numerous for this purpose, and I have contented my- 

 self with the following simple expression, which enables us to 

 calculate the temperatures of the New World. 



T = 81f Cos. 2 Lat X 1.13. 



This formula makes the Equatorial and Polar temperature 

 of the New World the same as those of the Old World, while 

 in intermediate latitudes the calculated and observed results do 

 not differ upon an average so much as 1°, as will be seen from 

 the two last columns of the preceding Table. 



The determination of the temperature of North America, 

 enables us to approximate with more certainty to the degree 

 of cold which exists at the North Pole ; and as this question 

 must always possess considerable interest in relation to any 

 attempt that is made to explore these icy regions, I would re- 



d d 2 quest 



