HOW ON MINERALOGY OF NOVA SCOTIA. 29 



Grand River in Western Canada, the only locality in old Canada 

 where workable deposits exist, the price is about |2 per ton at 

 the mine. The thickest bed there is about 7 feet only and the 

 amount annually raised was given in 1863 as 14000 tons. 

 (Geol. Canada, 763.) 



The produce of several quarries within a few miles of Wind- 

 sor are brought here for shipment. In this district the quarries 

 are worked on parallel beds running E. and W., the most north- 

 erly extending from Windsor through Wentworth and New- 

 port probabl}^ as far as Shubenacaclie some 30 miles to the east, 

 where plaster is also worked. The distance across the strike 

 from the north at Windsor to the most southerly quarries is 

 about three miles : at Windsor the dip is gently to the south. 

 The largest quantity of plaster is raised in the Clifton Quarry, 

 the i^roperty of Mr. Fellow, close to the town of Windsor, 

 where operations have been carried on about forty years. The 

 principal rock is gypsum, the anhydrite or hard plaster, is found 

 in lenticular masses from 2 to 10 feet thick in the centre and 

 sometimes 50 feet long, imbedded in the soft plaster. Mr. 

 Fellow considers that the amount quarried here has varied for 

 the last thirty years from 10,000 to 30,000 tons per annum and 

 for the last ten or twelve years from 20,000 to 30,000 tons. 

 The quarry is roughly estimated to be 800 feet long, 180 broad, 

 and 40 deep. The rock cropped out near the surface at the 

 north side anc^ on the south side a face of about 30 feet plaster 

 with a little limestone here and there is to be seen. Operations 

 in depth can nov/ only be carried on by aid of pumps, and a 

 steam pump has lately been erected. 



On another range to the south are extensive quarries, owned 

 respectively by Messrs. Wilkins, MTjetchey and Fellow, about 

 Ij^ mile from Windsor. The rock found here is of good 

 quality, a face of from 15 to 40 feet can be got, and the beds have 

 been traced across the strike for 300 feet. It is estimated that 

 much more than 100,000 tons have been extracted. 



On the last range south are the quarries of Mr. Black, south 

 of these are the metamorphic rocks of the Ardoise Hills. From 

 the Wentworth quarries about two miles from Windsor some 

 40,000 tons have been raised during the last two years. The 



