APPENDIX. 



I. METHODS FOR THE ANALYSIS OF FERTILIZERS. 

 THOMAS OB BASIC SLAG. PBOVISIONAL. 



[Page 1.] 

 1. Preparation of Sample. 



Prepare the sample for analysis as directed for other fertilizers or fertilizing mate- 

 rials (page 1, section 1). 



2. Phosphoric Acid. 



Make up the solution for analysis as directed in a 7 , page 2, under " (2) Total phos- 

 phoric acid, " or in strong hydrochloric acid alone. In the latter case after the portion 

 for analysis is measured out, add nitric acid and heat for a few minutes. Then deter- 

 mine total phosphoric acid according to the official methods (page 1, section 3). 



3. Fineness of Material. 



Determine the fineness of the material according to the plan followed with bone 

 meal and estimate the commercial value on the basis of total phosphoric acid and 

 fineness of product. 



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