406 Domestic. 



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

 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 Barbadoes. — The editor 

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

 badoes, specimens of the Barbadoes Tar, called in that 

 Island Green Tar, and of the indurated Bitumen; there 

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

 lent quality Mr. Sample remarks that the Tar "is found 

 very useful in preventing lockjaw, vvheri the first symptoms 

 are attended to, by rubbing the spinal bone from end to 

 end, and the muscles of the thigh and arms; when taken 

 inter(tally it is also a powerful sudorific. Of the Man- 

 jack I have lately made an excellent pitch with tar 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 Memphremagog. — Kotice of two 

 quarries of stone, lately discovered in Lake Memphremagog, 

 Lo-.icr 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 which lies above the water, is about twelve rods 

 in circumference. Hov/ far it extends into the lake, has 

 never been acertained. The island itself is about half a 

 mi'e from the eastern shore of the lake, and seven miles 

 we'^t of Stanstead village. The quarry which contains the 

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

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

 the vfater, and is some times six inches, and at others, three 

 feet below the surface. 



Mills have been erected on the shore of the lake, and 

 great quantities of these stones are annually prepared for 

 exportation. The coarser stone is found 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 quarriesj (about two years) the profits o-f 

 the proprietors have exceeded $5000. 



