286 On Liming Land, 



tioned any thing new to experienced farmers, or others 

 acquainted with the subject, I have, at least, endea- 

 voured to set an example ; so as to invite their com- 

 municating what they know to be instructive. Putting 

 a subject in requisition, always rouses attention ; and 

 draws forth useful facts ; and discussion conveying in- 

 struction, which would otherwise remain hidden, or 

 confined to the knowledge of a few individuals. What 

 may be familiar to experienced agriculturists, is never- 

 theless highly acceptable, and essentially instructive, to 

 those who want practical knowledge. 



Richard Peteks. 

 2d July 1810. 



To the Philadelphia Society for promoting Agriculture. 



able, as we find it in fact, that there is no hostiiit}7^. It is most 

 probable, that the sulphuric acid of the gyps, being the strong- 

 est, while the carbonic is the weakest, expels it, — sets it free 

 to act on the plant, — and repels farther supplies of fixed air- 

 taking possession of the lime. 



As to the point — whether the lime we commonly use is 

 or is not of the magnesian species, it yet depends on more 

 extensive examinations than have, in this early stage of inqui- 

 ry, been made, before a decisive opinion can be formed. So 

 far as the experiment Mr. Lang mentions reaches, the proof 

 appears strong. And if specimens of the limestone in other 

 quarters produce, when analyzed, the like results, the point 

 will be indisputably decided. 



R. P. 

 September 17 th, 1810. 



See hereafter Mr. Lang's communication. 



