929 ANNUAL REPORT OF THE Off. D«c. 



phosphoric acid have uot 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 phos- 

 phoric acid, the sum of the lowest figures given by him for soluble 

 and reverted phosphoric acid is used. The law of 1ST9 allowed the 

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

 element or in terms of the ammonia equivalent thereto; since am- 

 monia is composed of three parts of hydrogen and fourteen parts 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 mul 

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

 the amount of ammonia multiplied by 0.824 will give the correspond- 

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

 of nitrogen. 



The law of 1901 abolishes this alternative and requires that the 

 guaranty shall be given in terms of nitrogen. Many manufacturers 

 after complying with the terms of the law. insert additional items 

 in their guaranties, often with the result of misleading or confusing 

 the buyer; the latter will do well to give heed to those items onlv 

 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, excepting the miscellaneous class: 



Summary of Analyses made this Season. 



X_ ..vses 229 6 62 56 S7 



il -'nt.. i-U 5.7? 10.S« 9.04 5.72 



P;: 



U.« 15. S6 I2->>2 16.1^ 23.47 



Sclubie. per cent. 4.55 2.65 5.S2 S.iS 



Reverted, c-er cent. 3.S4 7.22 4. .5 4.96 



Insoluble, per cent., 2.57 3. CO 1.42 1.39 



Potash, per cent. 2.S5 2.37 J.2o 



Nitrogen, per cent 1-27 2.^ 



Mecbanicai analysis of bone: 



Fine W 



Coarse | ! ; ' SS 



Commercial valuation 123.43 1 $2T.eS ' J14.39 ' fl3.73 J27.32 



Average seiUn? price 2i.S3 2S.3iJ 15. SS 13.47 28.09 



Coniinerciai value of samples whose selling price 



is ascertained 23.S1 27.06 14.46 13.79 27.51 



The cases of departure of goods from their guaranteed composition 

 observed this season, including only those cases in which it amounted 

 to two-tenths per cent, or more, were as follows: 



