1912.1 



PUBLIC DOCUMENT — No. 31. 



59 



(g) Summary of Results of Analyses of the Complete Fertilizers as 

 compared with the Manufacturers' Guarantee — Con. 



MANUFACTUUEnS. 



•5i 



J3 D 



1^ 



— o 



C30 

 3 



a, q;. 



1^ 



Oo 



. a 

 : « 3 





I. c a 

 a> 0) rt 



C^ 3 



2;^ 



Rogers & Hubbard Company, 



Ross Bros. Company, 



N. Roy & Son, 



Sanderson Fertilizer and Chemical Company, 

 M. L. Shoemaker & Company, 

 Swift's Lowell Fertilizer Company, 

 20th Century Specialty Company, 

 AVm. Thomson & Sons, ..... 

 Whitman & Pratt Rendering Company, 

 Wilcox Fertilizer Company, .... 

 A. II. Wood & Co. 



The above table shows : — 



1. That 334 brands of registered complete fertilizers have 

 been collected and analyzed. 



2. That 191 brands (57 per cent, of the total nnniber an- 

 alyzed) fell below the manufacturers' guarantee in one or more 

 elements. 



3. That 135 brands were deficient in one element. 



4. That 51 brands were deficient in two elements. 



5. That 5 brands were deficient in three elements. 



6. That 41 brands (over 12 per cent, of the whole number 

 analyzed) showed a commercial shortage; that is, when the over- 

 runs were used to offset shortages they did not show the amount 

 in value of plant food as expressed by the smallest guarantee. 



The deficiencies found were divided as follows : — 



96 brands were found deficient in nitrocren. 



90 brands were found deficient in available phosphoric acid. 



6U brands were found deficient in potash. 



