INSPECTION OF COMMERCIAL FERTILIZERS 



31 



Muriate and High Grade Sulfate of Potash. 



Brands Substantially Meeting Their Guarantees. 



1 Two analyses. 



2 Two samples, collected at Topsfield and Beverly, had commercial shortages calling for 

 rebates as follows: $1.34, $1.25. 



3 Eleven analyses made, deficiencies occurring in all cases. The ton rebates applying on 

 each lot were as follows: $1.30, $2.29, $1.53, $1.41, $2.10, $1.07, $1.57, 92 cents, $1.57, 57 cents, 

 $2.22. Total rebate on tonnage sold in the state amounted to $325.94. 



Tests made on a composite sample composed of equal weights of the eleven samples showed 

 the following composition: 



Moisture .30 



Muriate of potash 73.53 



Sodium chloride 17.57 



Calcium chloride 3.58 



Magnesium chloride 1.06 



Ferric oxide .73 



Insoluble matter 3.23 



100.00 

 * Ton rebate due to deficiency, $1.87. Total rebate on tonnage sold in the state amounted 

 to $27.00. 



The actual composition of the salt is shown by the following detailed analysis: 

 Moisture .15 



Muriate of potash 7.02 



Sulfate of potash 77.64 



Calcium carbonate 



Magnesium sulfate 



Ferric oxide 



Insoluble matter 



Sodium sulfate (by difference) 



7.51 



.72 



.76 



5.17 



1.03 



100.00 



Carbonate of Potash, Sulfate of Potash-Magnesia and Manure Salts. 



Manufacturer. 



Apothecaries Hall Co. 



Old Deerfield Fertilizer Co., 

 Inc. .... 



Brand. 



[Carbonate of Potash 



■I Sulfate of Potash-Magnesia 



IManure Salts 



Sulfate of Potash-Magnesia 



Number 



of 

 Samples. 



Potassium 

 Oxide. 



_, , Guaran- 

 Pound. teed. 



62.54 

 26.15 

 22.28 



60.00 

 26.00 

 20.00 



26.00 



Chlorine. 



.60 

 2.13 



1 Three analyses. Average magnesium oxide present, 11.86%. 

 ' Magnesium oxide present, 10.50%. 



