668 



ANNUAL REPORT OF THE 



Off. Doc. 



guaranty not infrequently given. Tn reality, the sole guaranty is for 

 2 per cent. The guaranteed amounts given for each brand in the 

 following tables, are copied from the gun ran lies filed by the maker 

 of the goods with the Secretary of Agriculture, the lowest figure 

 given for any constituent being considered to be the amount guar- 

 anteed. For compactness and because no essentially important fact 

 is suppressed thereby, the guaranties for soluble and reverted phos- 

 phoric acid have not been given separately, but are combined into a 

 single guaranty for available phosphoric acid ; in cases where the 

 maker's guaranty does not specifically mention available phosphoric 

 acid, the sum of the lowest figures given by him for soluble and re- 

 verted phosphoric acid is used. The law of 1879 allowed the maker 

 to express his guaranty for nitrogen either in terms of that element 

 or in terms of the ammonia equivalent thereto ; since ammonia is 

 composed of three parts of hydrogen and fourteen ])arts of nitrogen, 

 it is a very simple matter to calculate the amount of one, when the 

 amount of the other is given; the amount of nitrogen multiplied by 

 1.214 will give the corresponding amount of ammonia, and the amount 

 of ammonia multiplied by 0.824 will give the corresponding amount of 

 nitrogen. In these tables, the expression is in terms of nitrogen. 

 The laws of 1901 and 1909 abolished this alternative and required 

 that the quantity shall be given in terms of nitrogen. 



Many manufacturers after complying with the terms of the law, 

 insert additional items in their guaranties, often willi tlie result of 

 misleading or confusing the buyer ; the latter Avill do well to give heed 

 to those items only that are given as the law requires and that are 

 presented in these tables: 



A summary of the analyses made this season may be presented 

 as follows: 



SUMMARY OF ANALYSES MADE THIS SEASON 



I 



-a 



o 



O 



Number of analyses, 

 Moisture, per cent., 



Phosphoric acid: 



Total, per cent., 



Available, per cent.. 

 Insoluble, per cent., 



Potash, per cent., — 



Nitrogen, per cent., 



Mechanical analyses of bone: 



Fine, -> 



Coarse. 



Commercial valuation, 



Average selling price, 



Oommercial value of samples 

 prioe is asoertained, — -- 



whose selling 



486 

 9.46 



9.86 

 8.31 

 1.55 

 4.97 

 1.53 



25.95 

 24.97 



25.89 



129 

 7.30 



10.86 

 9.88 

 1.00 

 3.97 



15.99 

 17.06 



16.97 



6 

 9.05 



13.00 



10.24 



2.76 



1.68 



23.82 

 20.33 



23.82 



51 



9.21 



15.93 



14.66 



1.27 



14. 2e 



15.83 

 14.25 



23 

 5.50 



22.86 



3.10 



."50 



50 



31.47 



30.93 



31.47 



