5l6 STRATIGRAPHICAL GEOLOGY, 



that^we have seen, but in Lempstcr, north of the signal on Lempster 

 mountain, there is one of considerable size that carries beryl. 



The vein in Acworth that has been celebrated many years on account 

 of its beryls, which have been widely distributed in this country and in 

 Europe, seems to be in altogether a different line of fracture from the 

 one we have followed, though the rock in which it occurs may belong to 

 the same series. The locality is known as Beryl mountain, and is on 

 the south side of Cold river, a mile south-west of South Acworth. The 

 vein is composed largely of quartz, some of which is rose-colored. The 

 excavation made for mica and beryl is on the north side of the hill, near 

 the top. The opening seems like a fairy grotto, fallen somewhat to 

 decay ; for it has been made in the pure white quartz, and in this are set 

 the beryl, several of which can still be seen. In 1830 Prof. C. U. Shepard 

 visited this locality and obtained a part of a crystal, the whole of which 

 he estimated to weigh two hundred and thirty-eight pounds. He sup- 

 posed this to be the largest crystal noticed up to that time. The vein 

 here seems to be confined to. the immediate vicinity of Beryl mountain. 



Southward, in Alstead, are several veins, but they are confined to the 

 east part of the town. On the road south of Mrs, S. Whitcomb's there 

 have been several openings made for mica, and black tourmaline is abun- 

 dant with the mica. At D. Knight's there is an opening, and at J. A. 

 Kidder's mica has been quarried. The most extensive excavations, how- 

 ever, are about half a mile west of S. Goodhue's. The vein extends south 

 of where it has been worked for mica, and the quartz, often translucent, 

 forms in this quite a distinct band by itself. An analysis of the feldspar 

 from this locality by J. D. Whitney, gave silica, 70.84 ; alumina, 21.20; 

 soda, lime, and oxide of iron, 7.97. 



Fine crystals of beryl are found, and perfect crystals of tourmaline 

 enclosed in the mica, and sometimes the tourmaline is found in the adja- 

 cent schistose rock. Southward, on Bald hill, in Surry, there is a coarse 

 granitic vein, but it is not known to contain any minerals of special 

 interest ; and farther than Bald hill we have not been able to trace this 

 vein. 



There are other beryl-bearing veins, but they are generally small in 

 size compared with those we have mentioned. There are some in Sulli- 

 van : one can be seen at Weathron & Cordney's. They are also found in 



