CHAPTER XII. 



that Island. 



The Agricultural Chemistry of Cacao. 



HIS Chapter is kindly contributed by Prof. J. B. 

 Harrison, M.A., Government Analyst, &c., &c., 

 of British Guiana. 



The main features of the chapter first 

 appeared in an olficial report by the Professor 

 on the soils of Grenada to the Government of 



The composition of the different parts of the cacao tree has 

 been treated upon by Marcano of Venezuela (a) and in part 

 by Boname, late of Guadeloupe, now of Mauritius (b). Opportu- 

 nities for studying the requirements of the plant as represented 

 by the composition of the mature trees themselves being very 

 limited we accept for guidance the result given by Marcano. 

 This authority estimates that a cacao tree twenty years old is 

 made up of — 



Trunk 



Large branches 



Medium branches 



Small Shoots 



Leaves 



49-5 

 211 

 11- 

 12- 

 64 



100 



(a) Essais d'Agronomie Tropicale. V. Marcano. 



fb) La culture de la canne a sucre a la Guadeloupe. Ph. Boname- 



