on the Geography of Plants. t267 



II. Virginia. Kentucky. Hispanic et Gr^cije partes 

 Meridionales *. 



III. Pennsylvania. Jersey. Connecticut. Latium. 



ROMELIA. 



Lat. Color. Med. 



Philadelphia 59° 56' 12° 7' Centig. 



Nov. Eborxcum 40° 40' 12° 1' 



Maclovium . 48° 39' 12° 5' 



Nannetes 47° 13' 12° 6' 



Neapolis 40° 50' 17° 8' 



Diff. "7° 0^ Diff. 5° 0' 



It could be wished that the author had explained, by what 

 method, in this comparison, he has obtained the differences 

 stated in the result ; for it is merely said, p. xxvii. ; '* Quibus 

 ex exemplis, methodo interpolationis collatis patet, &c." I think 

 the following has been his process. With a certain place in 

 North America, whose mean annual temperature is known, for 

 example, Natchez (31° 28' lat., 18° 2' mean temp.) he makes 

 a twofold comparison, viz., he first compares with this place 

 one in the Old World, which lies under the same degree of 

 latitude; the mean temperature of this last, compared with 

 that in North America, gives then the difference of tempera- 

 ture, which is placed at the end of the second column. Se- 

 condly, he compares with it a place in the Old World, which 

 has the same mean temperature, and this comparison then 

 gives the difference of latitude between the two places, which 

 is placed at the end of the first column. But, as we cannot 



• Among the places mentioned not one belongs either to Spain or Greece. 



