ON THE 



AGRICULTURAL AND COMMERCIAL VALUE 



OF SOME 



ARTIFICIAL MANURES, 



AND ON THEIK ADULTERATION. 



BY 



DK. AUGUSTUS VOELCKER, 



PROFESSOR OP CHEMISTRY IN THE ROYAL AGRICULTURAL COLLEGE, CIRENCESTER. 



REPRINTED, BY PERMISSION, 

 FROM THE BATH AND WEST OF ENGLAND AGRICULTURAL JOURNAL, 



LONDON: 



PRINTED BY W. CLOWES AND SONS, STAMFORD STREET, 

 AND CHARING CROSS. 



1855. 



