918 ANNUAL REPORT OF THE Off. Doc. 



fertilizer for one dollar; and that whereas in 1890 he was obliged to 

 pay at the factory 5G cents advance upon every dollar's worth of 

 raw material used by the manufacturer, in 1900 the advance was only 

 54.3 cents. 



The foregoing advances are not comparable w'ith those allowed in 

 the schedule of valuations to the mixer, for the cost of acidulation is 

 excluded in the latter case, having been already included in the 

 wholesale value of the acid rock and dissolved bone. 



The analytical work has been performed by the following assistant 

 chemists: Nitrogen, Mr. M. S. McDowell; soluble and insoluble phos- 

 phoric acid, Mr. C. W. Norris; potash and chlorin, Mr. M. H. Pingree; 

 moisture and total phosphoric acid, Mr. N. W. Buckhout. The list- 

 ing and preparation of samples were in charge of Mr. McDowell; the 

 computation and care of records in charge of Misses M. Garuer and 

 E. F, Jones. 



Respectfully submitted, 



WM. FREAR. 



Augusts, 1902. 



FERTILIZER ANALYSES, AUGUST 1 TO DECEMBER 31, 1902. 



Since August 1, 1902, there have been received from authorized 

 sampling agents, six hundred and three fertilizer samples, of which 

 all but two w'ere subjected to analysis, these two being rejected 

 because of insufficient description. When two or more samples 

 representing the same brand w-ere received, equal portions from 

 the several samples were united and the composite sample was sub- 

 jected to analysis. 



The samples group themselves as follows: 229 complete fertilizers, 

 furnishing phosphoric acid, potash and nitrogen; G dissolved bones, 

 furnishing phosphoric acid and nitrogen; 62 rock-and-potash fer- 

 tilizers, furnishing phosphoric acid and potash; 56 acidulated rock 

 phosphates, furnishing phosphoric acid only; 27 ground bones, fur- 

 nishing phosphoric acid and nitrogen; 2 miscellaneous fertilizers, 

 which group includes potash salts, nitrate of soda and other sub- 

 stances not properly classified under the foregoing heads. 



The determinations to which a complete fertilizer is subjected are 

 as follows: (1) Moisture, useful for the comparison of analyses, for 

 indication of drv condition and fitness for drilling, and also of the 

 conditions under which the fertilizer was kept in the warehouse. (2) 



