VI—Recent DEVELOPMENTS WITH THE CALYX DRILL IN 
THE NicTAUx Iron FieLpD.—By D’Arcy WEATHERBE, OC. E, 
Minss Dept. of N. S., A. M. Can. Soe. C. E. 
(Received August 20th, 1901.) 
Introductory : Geological and Historical. 
It would be as well perhaps for the benefit of those 
unacquainted with this district to preface the following account 
with a few descriptive remarks on its general geology. The 
measures which accompany the ferriferous deposits here are 
generally considered to be of Lower Devonian age. The 
area with which the operations herein to be described 
deal, may be said to be bounded as follows:—On the north 
by the Triassic red sandstones which underlie the con- 
temporaneous trap diorites of the North Mountain range; on 
the west by a band of granite extending northerly, partly 
across the valley between the North and South Mountain, and 
lying about a mile west of the Nictaux River. This latter is 
not strictly speaking a geological boundary, as the same veins 
of ore have been followed west of the granite, and are possibly 
overlain by it. On the south along the summit ridge of the 
South Mountain begins that enormous mass of granite which 
extends half way to the Atlantic Ocean, and effectually prevents 
prospecting in that direction. Towards the east, the boundary, 
as far as these veins are concerned, may be said at present to be 
ind fi rite, though they can be traced several miles east of the 
Nictaux River. 
Until 1891 little practical attention had been devoted to the 
prospecting of the region, and with the exception of the early 
attempts at mining and smelting, no development of any import- 
ance had been undertaken. In that year (1891), the Torbrook 
Tron Co. commenced operations on a vein of red hematite 
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