Mr. Herepattis Analyses. 245 



carbonic acid of course comes from the atmosphere, 

 but the principal ingredients you require as manure 

 I conceive to be phosphoric acid, sulphate of lime, 

 and carbonate of magnesia. About 100 Ibs. of 

 Peruvian guano, with 7 or 8 Ibs. of ground gyp- 

 sum, 10 Ibs. of magnesian limestone, and n Ibs. of 

 salt, mixed up with your vegetable (sic), or the 

 ashes o the wood clearance, and some of your 

 granite or quartz pounded, would, I think, make a 

 good manure for looolbs. of raw berries. I cannot 

 calculate what would be necessary to supply the 

 woody matter of the trees with nourishment, as I 

 do not know their chemical analysis, but should 

 imagine that if the whole of the woody matter or 

 their ashes were returned to the land it would be 

 sufficient ; but if any part of the vegetation is' not 

 economized, of course that loss must be made up 

 by manure. 



I am, Sir, 



Yours respectfully, 



(Signed) W. HEREPATH, F.C.S., 



Professor of Chemistry? 

 (5 Guineas^) 



It would thus appear that for every ton, or 

 according to the later analysis, for every 1000 Ibs. 

 of dried coffee beans produced, about 68 Ibs. of 

 certain mineral ingredients are lost to the soil. In 

 addition to which we have to consider not merely 



