35 



Ground Bone and Tankage — Concluded. 



Brands Showing a Commercial Shortage of $1 or over per Ton. 



' One sample, collected at Colrain, had a commercial valuation of $53.18 and a commercial shortage of 

 $1.34 per ton; another sample, collected at Amherst, had a commercial valuation of .$54.47 and a commer- 

 cial shortage of $1.25 per ton. 



- Two analyses made. 



3 Collected at New Bedford. Commercial valuation $35.32, commercial shortage $1.05 per ton. The 

 sample showed the presence of .60% nitrogen from ammonium sulfate and nitrate of soda, without the 

 addition of which the sample would have shown a commercial shortage of S3. 33 per ton. 



' Collected at Seekonk. Commercial valuation $46.37, commercial shortage 89.31 per ton. The sample 

 showed the presence of 4.09% of nitrogen from sulfate of ammonia (equivalent to 81.8 pounds nitrogen, or 

 about 400 pounds of ammonium sulfate in one ton of the product). Registration of the tankage was 

 immediately revoked. Later a representative of the company stated that an investigation showed that no 

 ammonium sulfate had been knowingly added to the tankage. A proper rebate was allowed the consumer. 

 The activity of the organic nitrogen present was satisfactory. 



Wood Ashes. 



Note. — ^The average total acid soluble potash in the seven samples analyzed was 6.36%. Average wood 

 ashes have about 31% of calcium oxide and 3% magnesium oxide which is in form to neutralize soil acidity 

 and for this purpose is worth around $5 per ton, as compared with the cost of like amounts of lime from 

 ground limestone and agricultural hme. 



