19 



Sixteen analyses have been made, representing 28 



Muriate of samples. In two cases the potash guarantee was 



Potash. not maintained. The average percentage of potash 



has been 50.74. The average retail cash price has 

 been $41.17 and the average calculated commercial valuation $40.59 

 per ton. The pound of actual potash has cost on the average 4.06 

 cents One brand has shown a commercial shortage of over fifty 

 cents per ton. 



Lowell Fertilizer Co., No. 241-371-608-1109. Potash found 

 49.24%, guaranteed 50.00%. 



Seven samples have been analyzed and found as 

 Kainit. represented. The average retail cash price has been 



$16.50 and the calculated commercial valuation 

 $10.85 per ton. The cost of potash per pound in this salt has been 

 6.08 cents. The average per cent of actual potash was 13.56. 



PHOSPHORIC ACID COMPOUNDS. 



Three samples of dissolved bone black were ex- 



Dissolved Bone amined and no deficiencies were found. The aver- 



Black. age available phosphoric acid found in this material 



was 16.06 per cent. The average calculated com- 

 mercial valuation has been $14.46. 



Eighteen analyses of acid phosphate were made, 

 Acid Phosphate, representing thirty-three samples. In all cases 



but two the guarantee of available phosphoric 

 acid has been maintained. The average retail cash price has been 

 $13.41 and the average calculated commercial valuation has been 

 $13.75 per ton. The average available phosphoric acid found in acid 

 phosphate was 15.39 per cent. The pound of available phosphoric 

 acid has cost on the average 4.36 cents. One brand showed a commer- 

 cial shortage of over fifty cents per ton. 



National Fertilizer Co., No. 214-1137. Available phosphoric 

 acid found 12.06%, guaranteed 14.00%. 



Ten analyses of Thomas basic slag phosphate 

 Basic Slag. have been made, representing 22 samples. No 



Phosphate. cases were found where the available phosphoric 



acid was below the guarantee. The average re- 

 tail cash price paid for basic slag was $14.89 and the average calcu- 

 lated commercial valuation $13.75 per ton. Slag has tested on the 

 average 15.89 per cent available phosphoric acid. The pound of 

 available phosphoric acid has averaged 4.69 cents. 



MIXED COMPLETE FERTILIZERS. 



For the sake of better comparison the mixed complete fertilizers 

 have been divided into three grades, as in previous years. Those hav- 

 ing a calculated commercial valuation of $24.00 or over per ton have 



