IMPERIAL INSTITUTE SERIES OF HAND- 

 BOOKS TO THE COMMERCIAL RESOURCES 

 OF THE TROPICS, WITH SPECIAL 

 REFERENCE TO BRITISH WEST AFRICA 



ISSUED UNDER THE AUTHORITY OF THE SECRETARY 

 OF STATE FOR THE COLONIES 



EDITED BY 



WYNDHAM R. DUNSTAN, C.M.G., M.A., LL.D., F.R.S 



DIRECTOR OF THE IMPERIAL INSTITUTE ; PRESIDENT OF THE INTER- 

 NATIONAL ASSOCIATION FOR TROPICAL AGRICULTURE 



