HOW — ON MINEKALS FOR THE PARIS EXHIBITION. 33 



varieties quite interesting to the Mineralogist, some of which I 

 owe to R. G. Haliburton, Esq. ; allied to these is a very 

 valuable addition to the class of combustible minerals dis- 

 covered by W. Barnes, Esq., namely, mineral pitch or bitumen, 

 which is shewn in most perfect globular masses and in other 

 forms in crystallized calcite and limestone. There is a good 

 deal of scientific interest attached to this specimen, which I 

 propose describing fully hereafter ;* in the mean time I may 

 say that it may turn out to be closely allied to the famous 

 albertite of New Brunswick. A few specimens of clays are 

 shewn from which common bricks, firebricks and pottery are 

 made in the Province. 



Copper is shewn in the native state from three adjacent 

 localities in the Bay of Fundy, and copper ores from several 

 parts of the Province. The ore from Poison's lake, of which 

 it is reported that the long sought vein has just been found, and 

 the rich ore of Tatamagouche are among these ; there is also 

 the beautiful chrysocolla or green silicate of copper from Cheti- 

 camp, and grey copper from several localities : the curious 

 cupriferous oxide of iron from Five islands is well represented. 

 Attention may be drawn also to the magnetic iron pyrites which 

 I have found to contain nickel, to the arsenical pyrites contain- 

 ing gold, and the ores of molybdenum, as interesting and 

 possibly hereafter commercially valuable ores. 



A pretty complete set of specimens shews the great variety 

 of forms in which gypsum or plaster occurs ; we have it red, 

 pink, black, white, opaque, and clear as glass, and perfectly 

 crystallized, in one specimen most curiously imbedded in a clear 

 crystal of glauber salt ; it is also shewn in the compact form 

 adapted for carving, as shewn in the specimen neatly executed 

 by C. Harding, Esq., of Windsor. The mass of selenite is 

 very good and will probably be much admired. Close by these 

 are a set of specimens shewing some of the varieties of hard 

 plaster. Very fine cabinet specimens of barytes are shewn, and 

 some very curious forms of calcite or calcspar, one of which in 

 the nail-head form of crystals, which looks like heads of nails 

 which seem to take their form from three blows with a hammer, 



^Described in Phil. Mag., May, 1867. 



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