1^ 



Thirty-nine samples have been examined 



Nitrate of representing sixteen analyses; all but one 



Soda. sample was found fully up to the guarantee. 



Nitrate of soda has cost on the average 



$50.70, and the average commercial valuation calculated by the 



table of trade values has been $51.03 per ton. The pound price 



of nitrogen from this source has been 16.39 cents. Only one sample 



showed a commercial shortage of over 50 cents per ton : 



The Coe-Mortimer Co., No. 1126. Nitrogen found 14.75%, 

 guaranteed 15%. 



Six analyses have been made representing 

 Sulfate of seven samples; all have been found of good 



Ammonia. quality. The average retail cash price per 



ton has been $71.13, and the calculated com- 

 mercial valuation $72.28 per ton. The average cost of a pound 

 of nitrogen has been 16.23 cents. 



Potash Compounds. 



Eighteen analyses have been made repre- 



High Grade senting thirty-one samples. The potash guar- 



Sulfate of antee was not maintained in five cases. The 



Potash. average retail cash price of this potash salt 



has been $50.78, and the average commercial 



valuation calculated from the table of trade values has been 



$51.47 per ton. The pound of actual potash in this form has cost 



on the average 5.18 cents. Two samples show a commercial 



shortage of over 50 cents per ton : 



Bowker Fertilizer Co., Nos. 218, 407. Potash found 46.36% 

 and 52.48%, guaranteed 48%. 



Five analyses have been made representing 



Potash- nine samples. The potash guarantee was 



Magnesia maintained in all cases. The average retail 



Sulfate. cash price has been $29.50, and the average 



commercial valuation calculated from the 



table of trade values has been $28.80 per ton. The pound of 



actual potash in this form has cost 5.38 cents. 



Sample No. 965, sold by the Mapes' Formula and Peruvian 

 Guano Co., New York City, was not a bona fide sample of potash- 

 magnesia sulfate, but evidently high grade sulfate of potash and 

 sulfate of magnesia reduced with sand. It contained 21.6 per- 

 cent material insoluble in hot water, the greater part of which was 

 unquestionably sand. The sample tested 8.98 percent magnesium 

 oxide in place of the usual 13 to 14 percent. Mr. Chas. H. Mapes, 

 secretary of the company, has this to say regarding the matter: 



