450 



REPORT — 1895. 



Fig. 10. 



ference to receive sedimsiit, thus forming a core to that height. The 

 marked crown (fig. 12) was then prepared by fixing across it, near to the 

 lower edge, a stout bar, on the under side of which were three strong steel 

 points, arranged in a straight line on the marked diameter. One steel 



point was placed on either side of the 



centre, at a distance therefrom of 5 inches, 



-CroiVro the third being at 4 inches from the 



, y, -.y^ centre. Tliis served to distinguish one 



.Iv^. . . \iofViar/(£d. \lhanwUr end of the bar from the other. The crown 



was placed over the hole at the ground 

 CiiU£r ' level, with the points of the three punches 

 in a line between the two fixed pointers. 

 Scale, 1 iu. to 2 ft. a,nd was lowered without rotation. The 



weight of the rods was allowed to come on the points, forcing them a 

 short distance into the stone, after which the crown was raised, again 

 without twist, the proof of this being that it returned with its line of 

 points exactly in their starting position. The core, when broken off and 



Fig. 11. 



•TuiuZar bcnnq rod 



''CoreCuJbe' 



Fig. 12. 

 TuiuZar iorth^ rocC 



CowilerbaZa/ux/ pfn^ht/ 

 ofwalerpipe^ 



^Diapfiroffm 

 Wcuc Cemenc 



Core 



Scale, 1 in. to 2 ft. 



Cort/Ud^e 



C'ossbar 

 CroYVrt 



l^'^n S(£eLpanckes 



Scale, 1 ill. to 2 ft. 



brought up, exhibited distinctly the three punch marks, indicating the 

 line whose bearing was known. The boring was then continued 2 feet 

 deeper, and an attempt was made to take a wax impression of the mark- 

 ings, but the attempt proved only, that the smooth surface, to which the 



