THE MINING AND QUARRY INDUSTRY I9I4 8l 



development of the Edwards property several years ago. The re- 

 sults of the underground exploration, which has been carried on 

 through two shafts, appear encouraging, as several thousands of 

 tons of concentrating material carrying up to 40 per cent or more 

 zinc have been uncovered. The product has been held in stock 

 until it could be milled, as practically none of it is of shipping 

 grade owing to admixture with pyrite. The first attempts in the 

 separation of the minerals in which a special type of magnetic 

 machine was employed did not prove a success. The ore was 

 treated without previous roasting, as it was aimed to secure both 

 the blende and the pyrite, the latter being in sufficient amount to 

 make a valuable by-product if recoverable. The general run of 

 the ore is fine-grained, and there is more or less serpentine and talc 

 in the gangue, which may add to the difficulty of mill treat- 

 ment. 



The outcome of the present undertaking is naturally awaited 

 with much interest; if successful it will mean a new industry in 

 that section and will lead no doubt to other developments in the 

 district. 



