HUTTONIAN THEORY. 



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182. A very remarkable facl of this kind oc- 

 curred not long ago, in digging the Huddersfield 

 canal in Yorklhire ; and a very diftind account 

 of it is given in the Philofophical Tra?ifa6tions, 

 by the engineer who directed the work. In 

 carrying a tunnel into the heart of a hill, the 

 miners came to what is called in the defcription 

 2i faulty throw, or break, or what we have here 



called a fhift, which was filled with. Jljale fet on 

 edge, mixed with fofter earth, and in fome pla- 

 ces with fmall lumps of coal. The fault or 

 fpace filled with thefe materials, was in general 

 about four yards broad, and lay nearly in the 

 diredion of the tunnel, fo that a confiderable 



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extent of it was vifible. Befide the fiiale, it 

 contained a rib of limeflone, about four feet 



thick, which run parallel to the fides o^ the fault, 



and about four feet from the fouthern margin 



of it. 



On each fide of this rib were found balls 



of limeftone, promifcuouily fcattered, and of 



fizes. from 



hundred pound 



weight. The balls, when broken, were found 



to contain fome pyrites near their edges ; they 

 were not perfectly globular, but flattened on the 

 oppofite fides, and fimilar to one another *. 

 At the time when the account was written, about 

 feventy yards of the rib had been difcovered. 



183. Now, 



^ Phil, Tranf. 1796. p. 350. 



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