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diredion of the mountain ; at another time in a quite contrary 

 diredion ; and as the mountain' has different vallies, as you turn . 

 from one to another you difcover the flate in all poflible 

 diredions. 



19th. Those flates are at one time tender and leafy — at another 

 time hard and very compad — they are intermixed with beds of 

 quartz, the grain of which refembles the petrofilex greatly. The hard 

 flates have a refemblance to what the Germans call hornblende, 

 and what the French czWJhorl en roche^ and to what they both 

 call gwifs. 



2oth. All the loads are traverfed in certain places by 

 beds of pure calcareous flone, pretty white, which is one 

 time parallel to the horizon, as at the top of the hill, which 

 is between the third and fourth vein; at another time in- 

 clined from forty-five degrees, as in the fliaft put down on the 

 fourth vein. 



2ift. One obferves in thofe calcareous beds the fame py- 

 ritous and fparry veins that we have defcribed in fedion the 

 fecond. 



2 2d. One fhould determine whether calcareous ftrata are inter-* 

 pofed in a parallel manner in the flates, or if they cut them like 

 veins, or if they form a particular fyftem on the fides of 

 the flates. 



23d. 



