1899.] 



PUBLIC DOCUMENT — No. 33. 



129 



namely, phosphatic slag, Mona guano, Florida phosphate, 

 South Carolina phosphate (floats) and dissolved bone-black. 

 The market cost of each of these articles controlled the 

 quantity applied, for each plat received the same money 

 value in its particular kind of phosphate. 



Analyses of Phosphates used. 



[I., phosphatic slag; II., Mona guano; III., Florida phosphate; IV., South Carolina phos- 

 phate; V., dissolved bone-black.] 



The following fertilizer mixtures have been applied an- 

 nually to all the plats, with the exception of Plat 3, which 

 received in 1890 ground apatite and in 1891 no phosphate 

 whatever : — 



