[ i5s ] 



Other plants generally as i to 1,3, 1,5, or 2 ; however, Mr. 

 Ruckert has marked foroe exceptions, which I fliaii mention as 

 worthy of notice. 



Proportion of Saline Suhjlances to the "Earthy,. 



These proportions have fome analogy with the quantity and 

 fort of manure proper to be employed in the cultivation of 

 thcfe plants and the fucceffion of crops. But I fhall enter no 

 farther into this fubjed, as it would lead me too far from the 

 prefent objed of enquiry.. 



The falts generally extraded from the alhes of vegetables 

 are tartar vitriolate, Glauber's fait, common fait, faJt of fylvius,, 

 gypfum, phofphorated calx, and fixed alkalis. 



Alkalis 



