CHEMISTRY OF CROP. 



399 



leaves from 1 5 to 20 per cent., and in the bines or stems 

 from 4 to 6 per cent. The amount of water in the hop is, 

 at the time of picking, about 12 to 20 per cent. 



The composition of this ash or inorganic matter is: 



The crop of hops Farnham White-bines from which 

 the samples analyzed were taken, was a large one, yielding 

 about a ton to the acre, or double the weight of what we 

 have assumed to be a fair average crop. Basing our cal- 

 culations, therefore, upon the foregoing data as to the 

 percentage and composition of the inorganic matter in the 

 hop plant, we find that the crop would have assimilated 

 and abstracted from the soil in which it was grown the 

 following quantities of mineral matter : 



