1873.] 



161 



[Lesley. 



On Walter's place near the brook, this lowest bed has been mined for 

 the furnace, 15 inches thick ; very fine ore. 



The heaviest covering- Mr. Walter has found lying upon the upper bed 

 of ore, anywhere on the slope from brook to hill top between his farm 

 and Griffith's, is 6 feet of olive slates. This is at the top of the hill up 

 from the last named mining ground. 



North of Walter's house, on the road, the above section gives 47 

 inches of ore, in 10 feet of space ; dip say 4° S. 70° East. See vertical 

 section. Fig. 8. 



About 900 yards east of the road, and on the north side of the ridge, a 

 shaft on the outcrop shows 47 inches of ore in 10^ feet of measures ; dip 

 say 8° S. 50° East. Fig. 9. 



About 500 yards east of the last exposure, and also on the north slope 

 of the ridge, 80 feet below its crest, the ore dips S. 30° E. 7° to 8°. Here 

 the ore crop leaves the ridge and strikes across to the mountain side. 



At the northeast end of Dutch Corner the next section shows 38 inches 

 of ore in 10£ feet of measures ; dip of sandstone S. 30° W. 17°. Fig. 10. 



The thickness of ore in each bed varies with every rod of outcrop, as 

 may be seen from the above vertical sections. 



The total thickness of ore in all three beds, on the contrary, scarcely 

 varies at all. In other words, one can confidently count on a total thick- 

 ness of between three and four feet of the ore in from ten to twelve feet 

 of measures. Secondly, on always having at least one of the three beds 

 of a good size. Thirdly, on always mining two of the beds in one gang- 

 way. One is always secure of at least two feet of good fossil ore, no mat- 

 ter where the beds are opened. 



This regularity conjoined with irregularity is well illustrated in one of 







2 7^- ' % CAAVJi&WiL \ St^JcTl xz: 





SKiembU^royifeo Rwijcrd Pa 



the two gangways of the Kemble Iron Company in the gap at Bedford. 

 It inspires great confidence in the mining qualities of the formation all 

 along Dunning's Mountain for twenty miles. The two connected sections, 



a. p. s. — VOL. XII. u 



