IN THE N1CTAUX IRON FIELD WEATHKRBE. 355 



A position was chosen for the first hole at a point about 12 

 feet south of the hanging wall of the "Shell Ore" vein. This 

 vein, as mentioned, has been proved for a long distance east and 

 west, and the dip at this point was supposed to be about 85 to 

 to the south. Thus the vein should have been tapped at a 

 depth of about 137 feet from the surface; but this, as will be 

 shown by the records given below, did not prove to be the case. 



In this first hole the following section was exhibited: 



At this depth, 60 feet from the surface, the hole was aban- 

 doned in consequence of its being blocked by boulders getting 

 jammed in it under the metal pipe casing, which it seems had 

 not been properly inserted below the surface of the bed rock. 

 A shaft had been dug for its insertion. 



The next hole, 15 feet to the eastward of no. 1, was the 

 same distance from the supposed position of the hanging wall. 

 Owing to a delay in the arrival of piping, it was not commenced 

 uniil Oct. 2Gth. From this date it was sunk continuously till 

 Nov. 2lst, when a depth of 201 feet was reached. 



PKOC. & TKANS. N. S. INST. Sci , VOL. X. TRANS. Y. 



