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 
that they have been practically tested. In the precambrian 
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,2. 0. curses ce occ». o>/c Joe 
Rock matter c,..o-. cm melee ee Behe k ce a Raa ave CHRO ene 
Witter. hci oe bic ee Ree eves chee 2a 
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 suitable furnace material, unusually free from 
injurious ingredients. The following tables of analyses and of 
working tests of concentration are of interest : 
