ELEMENTS U*5|^^ 



^3 





SCIENTIFIC AND PRACTICAL 



AGRICULTURE, 



OR THE 



APPLICATION OF BIOLOfeY, GEOLOGY AND CHEMISTRY TO 

 AGRICULTURE AND HORTICULTURE. 



INTENDED AS A TEXT-BOOK FOR 



FARMERS AND STUDENTS IN AGRICULTURE. 



/&,r,sr/A 



BY ALONZO GRAY, A. M. 



Author of Elements of Chemistry, and Teacher of Chemistry and Natural History 

 in Phillips Academy, Andover, Mass. 



ANDOVER: 



ALLEN, MORRILL AND WARDWELL. 



NEW YORK : 



DAYTON AND NEWMAN. 



1842. 



