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TRANSLATIONS AND NOTICES 



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GEOLOGICAL MEMOIRS. 



On Fluor-spar in the Lombardy Alps. By Dr. Curioni. 



[Proceed. Imp. Geol. Instit. Vienna, Feb. 23, 1858.] 



Sig. Curioni's paper ' Come la Geologia possa contribuire piu di- 

 rettamente ai progressi delle Industrie *,' gives a detailed notice of 

 nearly inexhaustible veins of flour-spar in the Lombardian Alps. 

 One vein of about four feet in breadth, and known along a consider- 

 able tract of its run, occurs on Monte Presolana, in the Val di Scalve, 

 N.W. of Lago Palzone ; another, of more than twenty-one feet 

 breadth, is imbedded in the red sandstone of Val Torgola, a branch 

 of Val Trompia, and runs N.E.-S.W. 



The fluor-spar of the second vein is nearly milk-white, of splintery 

 fracture, and contains 1^ per cent, of water, evaporating in elevated 

 temperature. It is but locally mixed with minute crystals of iron 

 pyrites. Its central portion includes galena, which, in the middle 

 of the fifteenth century, was an object of important mining enter- 

 prizes. [Count M.] 



On Crystallized Euclase in the Ural. By Col. Kokscharow. 



[Proceed. Imp. Geol. Instit. Vienna, Feb. 23, 1858.] 



Colonel Kokscharow noticed, in a letter to Director Haidinger, 

 his having discovered three specimens of crystallized euclase in the 

 gold-stream-works of the South Ural, near the River Sanarka, oc- 

 curring there associated with emeralds, red corundum, disthene, &c. 

 The mountain-chain, the detritus of which is deposited in these 

 stream-works, seems to Col. Kokscharow to bear a peculiar character. 

 On the map appended to Baron A. Humboldt's and Prof. G. Rose's 

 ' Travels to the Ural,' this chain differs completely in its direction 

 from the other chains of the South Ural. 



[Count M.] 



* Giornale del R. Istituto Lombardo, vol. ix. 

 VOL. XTV. PART II. E 





