C 109 ] 



RefpeBing a Plan of a Meteorological Chart, for exhibiting a 

 comparative view of the Climates of North America, and 

 the prog7-efs of Vt^eiSLi'ion, by Simeon De Witt, m. a. p. s. 



I 



T will not be denied that it is a defideratum, of no fmall 

 moment, in pradical Agriculture, to be enabled to afcer- 

 tain, with as much precifion as the nature of the cafe will 

 admit, the relative degrees of heat and cold, and of the proo^rels 

 of vegetation, through the feafons, in the various climates of 

 America, and fo to arrange them, as that they may be obferved 

 in the readieft manner. Without adducing any other reafon, 

 a fmgle reflexion will convince one of its utility ; for, as the 

 ftate of vegetation is very different in different climates at the 

 fame time, without knowing what allowances are to be made 

 on this account, the farmer, in one climate, will not be able 

 properly to apply to his pradicc the experiments on hufbandry 

 made in another ; and unlefs the refult of the obfervations, 

 from which this knowledge is to be deduced, be conveniently 

 arranged, one will be necefTitated to rumage through a confufed 

 heap of meteorological tables, colleded from various quarters 

 for a fuccefTion of years ; a bufinefs too difficult to prove 

 generally beneficial. It is in fome meafure owing to this caufe 

 that we profit fo little by books of hufbandry written in Europe. 



To obviate thefe inconveniencies is the defign of the plan 

 which I have the honor of prefenting. The requifites for 



