29 



EXPLANATION OF TABLES OF ANALYSES. 



In the tables of analyses the different fertilizers and fertilizer materials 

 have been grouped according to the kinds of plant food which they furnish. 

 All analyses have been arranged alphabetically according to the manufac- 

 turer's name as well as brand name. The groups are presented in the follow- 

 ing order: fertilizers furnishing nitrogen, phosphoric acid and potash; fer- 

 tilizers furnishing nitrogen and phosphoric acid; fertilizers officially collected 

 and not registered; wood ashes; ground bone and tankage; dry ground fish ; 

 lime compounds; nitrogen compounds; phosphoric acid compounds. What 

 few potash compounds have been analyzed will be found on the last page of 

 phosphoric acid products. 



In the tables of analyses will be found a column headed " Retail Cash Cost 

 of Like Amounts of Nitrogen, Phosphoric Acid and Potash in Unmixed 

 Materials," This, in short, is the comparative commercial valuation of each 

 fertilizer, computed as explained in detail in the text of the bulletin under the 

 heading " Fertilizer Valuations." 



The remaining data in the tables have been presented in substantially the 

 same form as in previous years, and will be found self-explanatory. 



