REVIEWS— GEOLOGICAL SURVEY OF CANADA. 455 
the St. Francis River to Farnham; while the second is due to an anticlinal axis 
which divides this general trough into two subordinate synclinal parts. Other 
synclinals present themselves further to the south-eastward, a general description 
of which was given in the Reports. 
“The existence of the copper ore on the thirty-second lot of the third range of 
Acton, was, I believe, discovered by Mr. H. P. Merrill ; and at the request of 
Mr. Cushing, the proprietor of the land, Mr. Hunt visited the locality in August 
last. As then seen, before any excavation had been made, the surface presented 
an accumulation of blocks of copper ore, evidently in place, and covering an area 
of about sixteen paces in length by ten paces in width. The masses consisted of 
variegated sulphuret of copper, intermingled with limestone and silicious matter, 
without anything like veinstone, and evidently constituted a bed subordinate to 
the limestone, whose strike was about north-east, with a dip to the north-west at 
an angle of about forty degrees. In continuation of this bed for about seventy 
paces in either direction, the limestone was observed to hold little patches and 
seams of variegated ore and yellow pyrites, with stains of the blue and green car- 
bonates of copper. The limestones in the immediate vicinity presented several 
veins of quartz crossing the strike, but containing only traces of copper. 
“During Mr. Hunt’s visit, a small amount of excavation was made with pick 
and shovel, and a further extent of work has been done since; but though this 
has not added materially to the information at first obtained, there ean be no 
doubt, even should the limits of the deposit extend no further than those above 
indicated, that there is here an unusually rich bunch of copper ore. 
“Jn the other two instances in which crop trials were recommended, the gangue 
Was opaque white quartz, from one to two feet in thickness, in which was dissemi- 
nated the pyritous sulphuret in Ascott and the variegated sulphuret in Inverness. 
The rock in both cases was described as chioritic and talcose slate. 
“Subsequent explorations in the township of Inverness and Leeds, by different 
individuals, have led to the disclosure of a considerable number of localities 
marked by cupriferous indications. Several of them have been tested in various 
degrees, by the Megantie ‘Mining Company and others, by shafts and excavations 
of moderate depths; and at the present time an efficient trial is in progress at 
Haryey’s Hill, in Leeds, by the English and Canadian Mining Company, who are 
pushing their work with considerable vigour, under the managemert of Mr. 
Herbert Williams. At Harvey’s Hill there occurs, on the seventeenth lot of the 
fifteenth range of the township, nine courses, composed chiefly of quartz, with 
various proportions of bitter spar, chlorite, and calc spar, and all holding in greater 
or less quantities the pyritous, variegated, or vitreous sulphurets of copper. The 
width of these courses varies from a few inches up to seven feet in the thickest 
part of some of them. In the trials on the surface, some of them, after yielding 
quantities of copper ore that seemed encouraging, have gradually thinned, both 
horizontally and vertically, and disappeared. To prove their character more 
thoroughly in a downward direction, an adit is now being driven on the north 
side of the hill, at a level which is thirty-seven fathoms below the summit. This 
will intersect nearly the whole of the courses, and until it is completed it would 
be premature to pronounce any positive opinion upon the success of the enterprise. 
