138 



Report op the Chemist op the 



INTRODUCTION. 



Number and Kinds op Fertilizers Collected. 

 During the entire year of 1897, we collected 1,005 samples of 

 co'Uimercial fertilizers, representing 748 different brands. It is a 

 matter of) interest to notice to what extent dealers offer for sale 

 complete fertilizers (those containing nitrogen, phosphoric acid 

 and potash), com^pared with those containing only one or two of 

 these ingredients. It is also of interest to consider the different 

 forms in which incomplete fertilizers are offered for sale. The 

 following tabulated statement indicates the different kinds of 

 complete and incomplete fertilizers collected during the year. 

 Classes of Fertilizers Collected in 1897. 



In the spring collection, 80 per cent of the brands offered for 

 sale consisted of complete fertilizers; in the fall, 69.3 per cent; 

 and, during the year, an average of 76.5 per cent. Of unmixed 

 materials, phosphoric acid was offered much more largely than 

 nitrogen or potash, the average for the year being about 10.5 per 

 cent of all brands offered. A smaller number containing phos- 

 phoric acid and nitrogen was found. It will be seen that the 

 mixture of phosphoric acid and potash was quite largely used, 

 averaging for the year over 12 per cent of all the brands collected. 



Composition op Fertilizers Collected in 1897, 

 The tabulated statement below shows the average composition 

 of the complete fertilizers collected during the year, together 

 with a comparison of the guaranteed connposition and that found 

 by analysis. 



