APPENDIX. 



AN AGRICULTURAL EXPERIMENT. 



the close of the Yale Agricultural Convention for 

 1860, Professor Porter promised to issue a scheme for some 

 simple and easily-conducted experiments, with the results of 

 which the Convention might contribute new material to the 

 practice and theory of rational agriculture. The business of 

 preparing a plan of trials having been confided to the under 

 signed, he has deemed it best to select some fertilizer as the 

 subject of experiment, and indeed, that substance which in 

 our country is everywhere accessible and cheap, its use being 

 unhampered by the burdensome imposts which still render it 

 expensive in nearly all other countries. This substance is salt ; 

 one which, furnishing indispensable ingredients to the digestive 

 fluids, performs most important offices in the economy of the 

 animal kingdom, and is, unquestionably, most naturally and 

 healthfully derived from the food itself. 



SAMUEL W. JOHNSON. 



Yale Scientific School, New Haven, Ct., March, 1860. 



EXPERIMENTAL STUDY OF THE USE OF SALT AS A FERTILIZER. 



THE action of salt as a fertilizer, has long been a matter of 

 uncertainty and dispute among agriculturists. In many cases 

 it has been reported to be extremely useful, in many more to 

 be entirely valueless, and in some positively disastrous. 



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