LECTURES 



ON THE 



GENERAL RELATIONS WHICH SCIENCE 



BEARS TO 



PRACTICAL AGRICULTURE, 



DELIVERED BEFORE THE 



NEW-YORK STATE AGRICULTURAL SOCIETY. 



BY 



JAMES F. W. JOHNSTON, F.R.SS. L.&E 



■WITH NOTES AND ADDITIONS 



NEW YORK : 



C. M. SAXTON, AGRIULTURAL BOOKSELLER, 



123 FULTON STREET. 



