A W E 



CELEBRATED 



SUPER XXX 35 SOLUBLE AND POTASSIC SUPERPHOSPHATE 



FOR GRASS LANDS 

 BONE MANURES AND SPECIAL MANURES FOR ALL CROPS 



IMPORTERS OF GUANO 



LAWES' CHEMICAL MANURE CO., LTD. 



Head Office: 59 MARK LANE, LONDON 



THE NEW STIMULANT 



VASTLY INCREASED CROPS 



Are obtained in the addition of a small percentage of 



SULPHATE OF MANGANESE 



TO ORDINARY MANURES 



At a cost not exceeding 55. to 75. per Acre. 



Prices on application to the Manufacturers 



R. H. PICKUPS & CO. 



Chemical Works, DRQYL5DEN, Near MANCHESTER 



PRACTICAL 



AGRICULTURAL 



CHEMISTRY 



My S. J. M. AULD 



D.Sc. (Lond.), Ph.D. (War/bury), F.I.C., F.C.S. 

 Professor of Agricultural Chemistry at University College, Reading 



And D. H. KDWARDES KEll 



Ji.A. (Oxon.), H-Sc. (Lond.) 



Head of the Chemical Department, South-Eastern Agricultural College 

 (University of London), Wye, Kent 



Thirty-two Illustrations 5s. net 



This book is intended as a practical handbook in Agricultural 

 Chemistry for students working through courses of instruction for 

 the London 13. Sc. degree in Agriculture and other examinations of a 

 similar type and standard. 



LONDON: JOHN MURRAY, ALBEMARLK STREET, \V. 



