A nalysis of Coffee. 243 



Potash 16*512 



Soda 6787 



Magnesia 5 '942 



Lime 2*329 



Sulphate of Lime . . . . 1*751 



with small quantities of sulphuric acid, chloride of 

 sodium, and silicic acid. 



" Consequently,",, remarks Mr. Herepath, " for 

 every ton of dried coffee beans that is raised 

 on a plantation, the proprietor must consider about 

 the following quantities of the various mineral 

 substances as having been removed from his 

 land : 



Ibs. oz. 



Phosphoric Acid . . .27 14^ 

 Sulphuric Acid . . . o 13 J 



Potash ii 4 



Soda 4 10 



Chloride of Sodium . .07 



Lime 18 14 



Magnesia . . . .41 



Silicic Acid or Silica ...05 



68 5 



"When bone-dust, cow-dung, and wood ashes 

 can be obtained and applied cheaply, of course 

 nothing can be better ; a little pounded gneiss 

 might be an improvement. Failing bone-dust 

 and cow-dung, then recourse must be had to 

 ammoniacal manures (such as guano), and to lime. 

 The dolomite of the interior contains, according to 

 R 2 



