104 B. Silliman, Jr., on the “ Barrel-Quartz” of Nova Scotia. 
and has a fissile and schistose structure, which gives, at first 
sight, the aspect of stratification to what is undoubtedly an in- 
trusive rock. When exposed to the action of the waves on the 
chytes of Montreal and Chambly,—with the latter of which, the 
trachyte of Shelburne, the only one of them which has been 
[To be continued. } 
Art. XILL—On the so-called ‘‘ Barrel- Quartz,” of Nova Scotia ; by 
B. SILLIMAN, Jr.’ 
On Laidlaw’s Hill, forming the eastern division of the Waver- 
ley Gold District, has been found, in great abundance, a peculiar 
variety of quartz-rock which has acquired a wide reputation 
under the name of barrel-quartz. 
Mr. Phillips, of London, has thus described it : 
“The most remarkable deposit of auriferous quartz hitherto 
found in Nova Scotia is undoubtedly that at Laidlaw’s Farm. 
The principal workings are here situated near the summit of a 
hill composed of hard, metamorphic shales, where openings have 
been made, to the depth of four or five feet, upon a nearly hort 
zontal bed of corrugated quartz of from eight to ten inches 10 
thickness. This auriferous deposit is entirely different from any- 
thing I had before seen, and when laid open presents the appear- 
ance of trees or logs of wood laid together side by side, after 
the manner of an American corduroy road. 
i) ik Hy \! al Mi ‘ i 
rom this So apne have applied the name of 
— 
