LECTURE 



ON THE 



APPLICATIONS OF CHEMISTRY AND GEOLOGY 



TO 



AGRICULTURE. 



*The profit of the earth is for a^l ; the king himself is served by the ^elAJ'—Eeclea. r. fi 



BY JAS. F. W. JOHNSTON, M.A., F.R.SS. L. & E., 



FELLOW OF THE GEOLOGICAL AND CHEMICAL SOCIEaTIES, 



Honorary Member of the Royal Agricultural Society, Foreign ..lember of the Royal 

 Swedish Academy of Agriculture, &c. &c ; Chemist to the Agricultural 

 Chemistry Association of Scotland, and Reader in Chemistry 

 and Mineralogy in the University of*Durham. 



NEW EDITION, WITH AN APPENDIX, 



OONTAININa SUGGESTIONS FOR EXPERIMENTS IN PRACTICAl, AGRICTILTtTaK 



NEW YORK: 

 C. M. SAXTON, AGRICULTURAL BOOK PUBLISHER, 



N«. laa FULTON STREET. 



%4t , 



