HOW — ON MINERALOGY OF NOVA SCOTIA. 



27 



water, while anhydrite is merely sulphate of lime. These sub- 

 stances are found here in quantity, exclusively in the lower 

 carboniferous rocks in close association with the lime-stones 

 described in the last part of these " Notes," (Trans. N. S. Inst., 

 1866.) In small amount fibrous gypsum and selenite are 

 found in new red sandstone and trap. The beds of plaster are 

 often of great thickness ; a few miles from Windsor lofty white 

 cliffs of it are seen on the road to Newport, and many fine 

 exposures are mentioned in " Acadian Geology." Although 

 comparatively few of the deposits have been worked to any 

 extent, a great deal of plaster has been quarried. The follow- 

 ing tables convey much valuable information ; it appears from 

 the last census returns that the amount of gypsum quarried was, 

 in 1850, 79,795 tons, and in 1860, 126,400 tons : the return for 

 the latter year shews that it was quarried in eleven out of the 

 eighteen counties in the following quantities aud gives its 

 value : — 



Gypsum quarried in JSFova Scotia in 1860, 



Counties. 



Tons. 



Value in Dollars. 



Colchester, 



6026 



5407 



Kings, 











Cumberland, 



259 



206 



Annapolis, 

 Fictou, 





 70 







46 



Hants, 



118215 



77883 



Antigonish, 



10 



10 



Inverness, 



12 



21 



Halifax, 



58 



53 



Lunenburg, 

 Yarmouth, 



300 

 



ISO 

 



l^igby, 



Guysboro', 

 Victoria, 







250 











190 







Queens, 











Shelburne, 











Richmond, 



1470 



1226 



Cape Breton, 



30 



24 



Total, 



126700 



85,186 



No census having been taken since 1861 we have offlcial 

 details only with regard to exportation, and I have made out 

 from the Trade Returns the following table, showing the 



