256 MINERALS FOR THE PARIS EXHIBITION. GILPIN. 



ore running high in lead and silver occurs at Caledonia, 

 Guysboro County, and at Smithfield, Hants County. 



Graphite. 



The upper or slate division of the Nova Scotia gold fields 

 frequently shows beds highly carbonaceous, but I am not aware 

 tnat they have been practically tested. In the prccambrian 

 felsites and gneisses of Cape Breton, plumbaginous slates are 

 not uncommon. Samples have been secured from the River 

 Dennys district, and from the vicinity of the Grand Narrows. 

 The rock from the latter locality yielded to the analyst of the 

 Geological Survey : 



Graphite Carbon 50.23 



Rock matter 43.27 



Water 6.50 



100.00 

 Copper. 



An interesting set of specimens and photos show the 

 development work of the Cape Breton Copper Company at 

 Coxheath, Cape Breton County. Here a number of deposits 

 have been traced for several thousand feet, and proved to depths 

 upwards of 300 feet. The deposits vary in thickness up to 12 

 feet, and may, so far as exploration work has been carried, be 

 described as very long lenses, bedded in precambrian felsites 

 and slates. 



While some of the lenses carry copper contents up to 10 per 

 cent., the ore will presumably belong to the class requiring 

 concentration. Working tests have shown that concentration 

 readily presents a suit-able furnace material, unusually free from 

 injurious ingredients. The following tables of analyses and of 

 working tests of concentration are of interest : 



