ON THE 



COMPARATIVE VALUE OF DIFFERENT 

 ARTIFICIAL MANURES 



FOB RAISING 



A CROP OF SWEDES, 



WITH REMARKS ON THE COMPOSITION OF THE MANURES EMPLOYED 



IN EXPERIMENTAL TRIALS MADE AT THE ROYAL 



AGRICULTURAL COLLEGE, CIRENCESTER. 



BY DR. AUGUSTUS VOELCKER, 



PROFESSOR OF CHEMISTRY IN THE ROYAL AGRICULTURAL COLLEGE, 

 CIRENCESTER. 



L O N D () N. 



M D C C C L V, 



