39 



Ground Bone and Tankage — Concluded. 



Brands Substantially Meeting their Guarantees — Concluded. 



Wood Ashes. 



Wood aslies have sold during the season so that the pound of total potash has 

 cost 20.6 cents after deducting the value of phosphoric acid and lime (about 

 1.80 per cent for the former and 31 per cent for the latter). The potash in ashes 

 is largely present as carbonate, which may give it an added value over potash in 

 form of muriate or sulfate for some purposes in agriculture. As wood ashes are 

 valued largely for their content of potash and lime, it may not be out of place to 

 record that carbonate of potash guaranteed 65.43 per cent K2O is at present quoted 

 in the "Oil, Paint and Drug Reporter" at $160 per ton at works. Allowing 20 per 

 cent increase for overhead, the pound of actual K2O in this form would cost about 

 15 cents, or $3 per unit. All brands substantially met their guarantees. 



Note. — • Variation in percentage composition: moisture, 2.58 to 23.15; phosphoric acid, 1.02 to 2.58; water 

 soluble potash, 1.82 to 7.77; inisoluble earthy matter, 2.88 to 27.35. The average acid soluble potash found was 

 5.86. For the sake of safety, the shipper purposely guarantees a low percentage of this ingredient. In order to 

 inow just what he is getting, the purchaser should buy such material only on analysis. 



