230 



UNIVERSITY OF VIRGINIA PUBLICATIONS 



Partial Analysis .* 



Per cent 



Loss on ignition 37 . 43 



Phosphoric anhydride 10 . 33 



Alumina 36.33 



In addition to the above it contained a trace of silica, while lime and mag- 

 nesia also were observed in "considerable quantity." 



To the above should be added also the approximate analysis made by 

 the U. S. Geological Survey in which phosphoric acid was "determined by 

 difference." It is accompanied here, for the purpose of comparison, by 

 the analysis made on the evansite found in the vicinity of Goldburg, Idaho. 



Analysts of Evansile from Alabama, j 



Per cent 



AI2O3 38.33 



CaO 1.03 



MgO 0.75 



Loss on ignition 38 . 19 



P2O5 (by difference) 21 .70 



100.00 



Analysis and loss of water of Evansite from Idaho, t 



* Bull. 59, A. I. M. E. 

 t U. S. G. S. Bull. 490. 

 t U. S. S. Bull. 490. 



