506 



Transactions. 



New Plymouth Sands. 

 Six representative samples were received from New Plymoiitli, and 

 these, on analysis, gave the following results : — 



Of these six sands, No. 1, representing a fair average sample, and 

 No. 5, the poorest in iron, were separated magnetically, as previously 

 described, into three portions, and the analyses of the strongly magnetic 

 portions, together with those of the original sands, are given in Table II. 



Degree of concentration for strongly magnetic portion 

 original sand ; No. 5, 37 per cent, of original sand. 



No. 1, 80 per cent, of 



More complete analyses were made of two of the strongly magnetic 

 concentrates : A, Patea sample No. 2, being highest in iron-content, Patea ; 

 B, New Plymouth No. 1, being the richer of the New Plymouth samples 

 treated. 



Analyses. 



Silica (SiOo) . . 



Alumina (AlgOg) 



Lime (CaO) . . 



Magnesia (MgO) 



Titanium dioxide (TiOa) 

 *Phosphoric anhydride (PgOg) 



Vanadium pentoxide (VgOg) 

 , ( Ferrous oxide (FeO) . . 

 T ( Ferric oxide (FeaOg) . . 



*Equivalent to phosphorus 

 fEquivalent to metallic iron 



100-00 



0-18 

 60-42 



100-00 



0-32 



56-22 



These may be taken as typical analyses of magnetically separated con- 

 centrate, and afford data for determining the nature and quantity of flux 

 necessary for smelting. 



