25 



superintendent was made to the effect that the stock from which 

 this lot was shipped ran over 15% available phosphoric acid, but 

 that in making the shipment, which consisted of only about one 

 ton, it was remilled through a mill which evidently was not proper- 

 ly cleaned after milling complete goods. 



The other brand showing a shortage was put out by the Swift's 

 Lowell Fertilizer Co., Brand No. 344. It tested 13.68% available 

 phosphoric acid, 15% being guaranteed. 



Fifteen samples of acid phosphate have been ex- 

 Acid amined and all but two were found well up to the 

 Phosphate. minimum guarantee. No commercial shortage 

 of over 50 cents a ton occurred. The pound of 

 available phosphoric acid from acid phosphate has cost 5.44 cents. 



Seven samples have been analyzed and all were 

 Basic found well up to the guarantee. The pound of 



Slag available phosphoric acid from basic slag, as de- 



Phosphate, termined by Wagner's Method, has cost on the 

 average 5.12 cents. 



Mixed Complete Fertilizers. 



The grouping of the complete fertilizers into 



Study of three different grades furnishes a convenient 



Grades of means of showing the superior advantages to be 



Fertilizer. derived from the piirchase of high grade fertilizers . 



In the tables below the high grade fertilizers are 



represented by those brands having a commercial value of $24 or 



over per ton; the mediiun grade by those which value between $18 



and $24; and the low grade those which value $18 or less per ton. 



Table showing average cash price, commercial value, money 

 difference between cash price and valuation, and percentage dif- 

 ference of the three grades of fertilizer. 



