1911.] PUBLIC DOCUMENT — No. 31. 55 



Complete fertilizers, ......... 316 



Fertilizers furnishing phosphoric acid and i)otash, ... 14 



Ground bone, tankage and dry ground fish, ..... 53 



Chemicals and organic compounds furnishing nitrogen, . . .82 



Total, 465 



Fertilizers collected. 

 With but few exceptions, representative samples of every 

 brand of fertilizer sold in the State have been secured. The 

 collection work was in charge of Mr. James T. Howard, the 

 regular inspector, assisted by Mr. A. B. Harris. As a gen- 

 eral rule an effort has been made to collect samples of the same 

 brand in different parts of the State, and to make one analysis 

 of a composite sample made up of equal weights of the several 

 samples. It is believed that this method will prove more sat- 

 isfactory than when the results are based upon the analysis of 

 a single sample. In all cases at least 10 per cent, of the num- 

 ber of bags found present were sampled ; in cases where only a 

 small amount of any particular brand was found in stock a 

 larger percentage of the bags was samplal (often 50 to 100 

 per cent.), and in no case were less than five bags sampled 

 without the fact being stated on the guarantee slip which is sent 

 to the station laboratory with every brand of fertilizer sampled. 

 One hundred and fourteen towns were visited, and samples of 

 fertilizers were taken from 291 different agents. Eight hun- 

 dred and ninety samples were drawn, representing 487 distinct 

 brands. Some of the brands represent private formulas which 

 farmers have had manufactured for their o^vn use. The analy- 

 ses of such brands were published in the bulletin in a table by 



themselves. 



Fertilizers analyzed. 



A total of 612 analyses was made in connection with the 



inspection of 1910. They may be grouped as follows: — 



Complete fertilizers, 418 



Fertilizers furnishing potash and phosphoric acid, such as ashes, 



superphosphates and potash, 21 



Ground bones, tankage and fish, ....... 71 



Nitrogen compounds, ......... -^0 



Potash compounds, .......••• 3'-^ 



Phosphoric acid compounds, 20 



Total, 612 



