2 44 Cojfee Planting. 



Dr. Gygax, the proper proportion of phosphoric 

 acid in the shape of apatite or phosphate of lime." 



In 1858 the Ceylon Planters' Association ob- 

 tained from the same chemist a new analysis, this 

 time of Ceylon Plantation Coffee. This is given 

 in the following letter, addressed to Mr. W. H. 

 Walters, Bambra Ella Estate : 



" Sir, I have studied the subject of your letter, 

 through the Rev. Walter Marriott, and having 

 made the necessary experiments and calculations, 

 I have to report that 1000 Ibs. of raw coffee berries 

 of Ceylon Plantation growth contain as under of 

 mineral ingredients : 



Ibs. 



Potash . . . . . .37 



Lime . . . . . 2 I 



Magnesia 5l 



Peroxide of Iron .... 3 



Sulphuric Acid 2^ 



Chlorine f 



Carbonic Acid uf 



Phosphoric Acid .... 7 



67* 



" I do not know the exact analysis of your 

 granitic rocks, but presume they must contain a 

 little potash, lime and iron, and possibly magnesia ; 

 but the ash is too alkaline for me to think that all 

 the potash comes from that source, the principal 

 portion of it must come from the felled wood ; the 



