24 



following analysis: nitrogen found, 1.81 per cent., guaranteed, 2.88 per cent.; 

 available phosphoric acid found, 9.59 per cent., guaranteed, 8 per cent.; potas- 

 sium oxide found, 3.27 per cent., guaranteed, 3 per cent. 



Corn, Grass and Grain Fertilizer, No. 887: nitrogen found, 2.53 per cent., 

 guaranteed, 2.88 per cent.; available phosphoric acid found, 8.17 per cent., 

 guaranteed, 8 per cent.; potassium oxide found, 1 per cent., guaranteed, 1 

 per cent. 



Unsuccessful attempts were made to procure other samples of this brand 

 for inspection purposes. 



F. S. Royster Guano Co. — Royster's Drillwell Phosphate, No. 904: nitro- 

 gen found, 2.07 per cent., guaranteed, 2.47 per cent.; available phosphoric 

 acid found, 7.91 per cent., guaranteed, 8 per cent.; potassium oxide found, 

 1.07 per cent., guaranteed, 1 per cent. 



Whitman & Pratt Rendering Co. — Whitman & Pratt's 4-8-4 Brand : 

 nitrogen found, 3.50 per cent., guaranteed, 3.28 per cent.; available phos- 

 phoric acid found, 8.88 per cent., guaranteed, 8 per cent.; potassium oxide 

 found, 3.20 per cent., guaranteed, 4 per cent. 



AMMONIATED SUPERPHOSPHATES. 



Summaries show that out of 151 brands of ammoniated superphosphates 

 analyzed 36 (23.8 per cent, of the total number) fell below the minimum guar- 

 antee in one or more elements. Thirty-four brands were found deficient in 

 one element and two in both elements of plant food. Thirty-one brands were 

 found deficient in nitrogen and 7 in phosphoric acid. One brand showed a 

 commercial shortage of over $3 per ton, 3 between $2 and $3, 5 between $1 

 and $2, and 5 under $1, but not less than 50 cents. Following are the brands 

 which have shown serious commercial deficiencies: — 



W. H. AbboU. — Ahhott's Eagle Brand, No. 906: nitrogen found, 3.44 

 per cent., guaranteed, 4 per cent.; available phosphoric acid found, 9.49 per 

 cent., guaranteed, 8 per cent. 



Upon receipt of advanced report of this analysis, the manufacturer advised 

 that the sample had evidently been taken from goods which had been mixed 

 for his owTi personal use and to which some wood ashes had been added. A 

 test for potash did reveal nearly one half of 1 per cent, of potassium oxide. 

 Later in the season a new batch of this brand was mixed to fill a belated order. 

 A certified representative sample, which also ran low in nitrogen, w^as sent for 

 analysis by the manufacturer, but gave a better showing than did the other 

 sample. No. 939: nitrogen found, 3.56 per cent., guaranteed, 4 per cent.; 

 available phosphoric acid found, 9.35 per cent., guaranteed, 8 per cent. 



