,52 Miscellaneous Localities of Minerals. 



sue several springs of pure limpid water from caverns of 

 perhaps two feet diameter, and unknown extent. The 

 Middle hill is N. of the first, and the 3d is N. W. of the 

 middle hill, between which a small brook meanders 

 through a small patch of meadow. This latter hill fur- 

 nishes the rhomb spar, and silvery talc, and lime of the best 

 quality, called "Jointa," because it has frequent seams 

 which divide the rock into irregular segments with a 

 smooth face — when burnt the lime does not " air slack," 

 so soon as most other lime, but continues in lumps. Ad- 

 jacent to the W. side of this rock is a ledge of argillite, 

 dipping at a ver}' acute angle. 



24. 'Greenstone, a vein about eight inches wide running 

 nearly N. and S. through the middle lime rock, dipping E. 

 apparently about forty-five degrees ; another similar vein 

 exists about fifteen feet E. of this, two and a half to three 

 feet wide. 



25. The principal rock in the hills and in the vicinity of 

 the lime rocks. 



26. Slate, forming a vein three to five feet wide, run- 

 ning E. and W. through the middle of " the Dexter Lime 

 Rock,'''' having an acute dip to the E. Some of it contains 

 sulphuret of iron. 



The Dexter Lime Rock, of much the same appearance 

 and quality of the Harris Lime Rock, is situated a little 

 more than a mile S. E. from the latter, and about | a mile 

 W. of Blackstone river on the W. side of a basin, which is 

 considerably elevated above the Blackstone, surrounded 

 by hills of argillite. 



G0,000 casks of lime have been burnt in one year, from 

 the Harris and Dexter rocks. It is said this lime will ad- 

 mit considerably more sand than most other lime and form 

 as good cement. 



27 and 28. Sandstone Slate, or micaceous sandstone, 

 fair specimens of the formation of " Woonsocket Hill," 

 about a mile S. of W. from Woonsocket village. Smith- 

 Jidd. 



29. Micaceous Sa7idstone, or whetstone slate, a vein 

 commencing about \ a mile N. E. of Woonsocket Village 

 and running S. W. about a mile. Some years from six to 

 eight thousand dozen whetstones have been quarried in 

 this place, but the average number for ten years past is 



