406 Domestic. 



with square bases — the sides of the crystal are not more 

 than a fourth of an inch — and I found only two or three 

 specimens. Tabular and radiated quartz occurs abun- 

 dantly in this town, and most beautiful graphic granite. 



20. Bituminous Substances of Barhadoes. — The editor 

 has recently received from James R. Sample, Esq. of Bar- 

 badoes, specimens of the Barbadoes Tar, called in that 

 Island Green- Tary and of the indurated Bitumen; there 

 called ManjacR. The green tar is petroleum of an excel- 

 lent quality- Mr. Sample remarks that the Tar '^is found 

 very useful in preventing lockjaw, when the first symptoms 

 are attended to, by rubb'ng the spinal bone from end to 

 end, and the muscles of the (high and arms; when taken 

 internally it is also a powerful sudorific. Of the Man- 

 jack I have lately 'made an excellent pitbh u'ith t&r and tal- 

 low, which makes wood impervious to water, and 1 have 

 no doubt would also make a good varnish." 



21. Oil stone of Lake Memjihremagog. — Notice of tico- 

 quarries of stone, lately discovered in Lake Mimphremagogy 

 Lorcer Canada. — Communicated by Mr. Austin O. Hub-- 

 bard of Stanstead, L. Canada. — The island on which the 

 whitish stone is found, is one hundred rods long, and from- 

 sixty to seventy broad. The ledge from which the stone 

 is taken, is situated at the southeast corner ; and that part' 

 of the ledge wdiich lies above the water, is about twelve rods 

 in circumference. How far it extends into the lake, has 

 never been acertained. The island itself is about half a 

 mile from the eastern shore of the lake, and seven miles 

 tve^t of Stanstead village. The quarry which contains the 

 oil-stone, lies a Tew miles north of the island above men- 

 tioned, close to the eastern shore. It is wholly covered by 

 the water, and is some times'sixinchesj and at others, three 

 feet below the surface, 



3Iills have been erecttd on the shore of the lake, and 

 great quantities of these stones are annually prepared for 

 exportation. The coarser stone Is fouiid to be good for 

 common purposes, and the oil-stone is said to be equal, if 

 not superior to that of Turkey. Indeed some idea may be 

 formed of their excellence, from the fact, that since the dis- 

 covery of the two quarries, (about two years) the profits of 

 the proprietors have exceeded 55000. 



/ 



J" 



