4.40 Report op iNsrECTioN Work of thq 



INTRODUCTION. 



NUMBER AND KINDS OF FERTILIZERS COLLECTED. 



During the year 1900, the Station's collecting agents visited 

 138 towns between April 5 and October 1, obtaining 638 samples 

 of commercial fertilizers. These samples represent 450 different 

 brands, the product of 92 different manufacturers, each manu- 

 facturer being represented by from one to 28 brands. 

 , The subjoined tabulated statement indicates the different 

 classes included in the collection. 



Classes of Fertilizers Collected. 



^ , Brands con- Brands con- 



Brands con- ^f"^ ^W brands con- taining nitro- ^J'''°h"„no brands of 



tainingonly E^horiL^ taininsonly gen ai>d phos- P^cfdand complete 



nitrogen. P'^^S"" potash. ^P^^oru, ac d /J^t^^^f,^ fertihzera. 



wunouipoiasn. ^^^ uitrosen. 



10 37 9 20 48 326 



' COMPOSITION OF FERTILIZERS COLLECTED. 



The following tabulated statement shows the average composi- 

 tion of the complete fertilizers collected during the year, together 

 with a comparison of the guaranteedvcomposition and that found 

 by analysis. 



Average Composition of Complete Fertilizers Collected. 



Average 

 Per ct. guaranteed Per ct. found. found 



Lowest. Highest. Average. Lowest. Highest, average, guj^^ajj. 



tee. 



Nitrogen 0.39 8.25 2.06 0.44 8.15 2.16 0.10 



Available phos- 

 phoric acid 0.63 12.00 7.62 1.20 17.47 8.90 1.28 



Insoluble phos- 

 phoris acid.... 0.00 13.20 2.50 



Potash 1.00 11.00 4.43 0.27 12.00 4.84 0.41 



Water-soluble ni- 

 trogen 0.00 7.10 0.89 



Water-soluble 

 phosphoric acid 0.00 9.95 5.52 



