21 



CHEMICALS AND RAW PRODUCTS. 



Summary of Results of the Inspection of Fertilizer Simples and Raw Products. 



' In calculating the pound cost of nitrogen and the commercial valuations, the value of the phosphoric 

 acid and potash was not included. The average commercial valuation of the vjhosphoric acid and potash, 

 based on 1927 fertiUzer trade values, for cottonseed meal would be $3.78, and for castor pomace $2.11. 



' Average tankage finer than 1/50 inch diameter, 43.95 per cent; coarser than 1/50 inch, 56.05 per cent. 



s Average bone finer than 1/50 inch diameter, 66.94 per cent; coarsser than 1/50 inch, 33.06 per cent. 



* This valuation does not include the lime and magnesium oxide which in a ton of average wood ashes 

 would have a value of about $5.00. 



5 Total potash. 



' Nitrogen much more active than in sheep and cattle manure, therefore placed at a higher value. 



Nitrogen Compounds. 



Fertilizer chemicals and unmixed materials valued chiefly for their nitrogen 

 will be found in the tables under this heading. Where more than one analysis 

 has been made of the same brand, averages are given instead of publishing each 

 separate analysis. Footnotes refer to such cases. Brands showing a commercial 

 shortage of one dollar per ton are grouped by themselves. Deficiencies are em- 

 phasized by boldface type. 



