51 



The following are types of good cocoa soils recently examined in the 

 Government Laboratory : — 





C8 



t-> 



ea 



Grenada. 



ncent. 



eS 



d 





Deme: 



No. 1. 



No. 2. 



No. 3. 



No. 4. 



> 



CO 



'u 



- 



Nicari 







1. Organic matters & com- 

 bined water 



9-031 



7-644 



10-442 



10-993 



9-688 



3-046 



3-768 



10-816 



Phosphoric anhydride 



•087 



•082 



-184 



-044 



•058 



.114 



•084 



•293 



Sulphuric anhydride 



•018 



•118 



traces. 



traces. 



-027 



.055 



traces. 



•141 



Chlorine 



trace. 



traces. 



nil 



traces. 



traces. 



traces. 



nil 



•O07 



Iron peroxide 



4-783 



9.085 



9-485 



18-672 



12-033 



9-574 



3-910 



7-000 



Alumina 



9-217 



13-628 



10-024 



17-140 



12-710 



8-889 



2-038 



4-717 



Manganese oxide 



-347 



•191 



-313 



-379 



.249 



-435 



-12. 



•163 



Calcium oxide 



.696 



1*335 



2-379 



-481 



1-183 



4-981 



-356 



2^250 



Calcium carbonate 



.032 



-236 



-026 



•185 



•099 



nil 



nil 



nil 



Magnesium oxide 



•404 



1-367 



3-367 



1-261 



-680 



2-418 



•495 



•21T 



Potassium oxide 



•291 



•254 



-343 



•169 



•428 



•178 



•118 



•619 



Sodium oxide 



•208 



•393 



-574 



-197 



1-102 



-369 



•278 



1^184 



Insoluble silica & silicates 



74-986 



65-667 



62-863 



50-509 



61-743 



69-941 



88-826 



72^594 





lOO-OOO 



100-000 



100-000 



100-000 



100-000 



100- 000 



100-000 



lOO^OOO 



1 Containing nitrogen ... 



-262 



•309 



-271 



-286 



-224 



-205 



•100 



-228 



Water retained by air dried 

 soil 



6.5 



8-5 



12-4 



14-3 



9-6 



8-1 



1-8 



8-0 



1 



The samples from Grenada, St. Vincent and Demerara were pe' sonally 

 selected by one of us, whilst those from Trinidad and Nicaragua were 

 given to us and described as very fertile cocoa soils by J. H. Ha it. Esq., 

 F.L.S., the Superintendent of the Botanic Gardens, Trinidad. With the 

 exceptions of the Demerara and Trinidad samples, all are of soils aris ng 

 from the degradation of lavas and volcanic debris, rich in soda lime fel- 

 spars. Asa rule these fertile cocoa soils are fairly rich in nitrogen, and 

 contain a somewhat high amount of potash of which a relatively high 

 proportion was found to be soluble in 1 per cent, citric acid solution, 

 whilst the proportion of phosphoric anhydride present appears to be of 

 lesser importance. They can, we consider, be safely regarded as relia- 

 able types of the composition of really fertile cocoa soils. 



In order to obtain reliable data as to the composition of cocoa grown 

 under fairly favourable conditions at low elevations in this colony, we 

 availed ourselves of the kindness of Charles Eoss, Esq., of Pin. Land of 

 Canaan, Demerara River. He supplied us with a large number of 

 f I eshly gathered ripe pods of cocoa of two varieties : 1 st the small podded, 

 thick, smooth skinned variety with flat beans, known as Calabacillo ; 

 and, 2nd, the large podded somewhat thick rough skinned variety with 

 full rounded beans known as *' Forastero." The former is the variety 



