MR ROBERTSON ON THE IRON MINES OF CARADOGH. 



703 



The construction and dimensions of these hearths, and of the different imple- 

 ments required in working them, will be best explained by the accompanying 

 drawings. 



Fig. 3. 



Fig. 4. 



Fig. 9. 



Fig. 5. 



FIl-. C. 



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:#*^ 



Scale. 



12 1 2 



Inches. I Ivu] i — 



J e 7 8 e 10 



I I I I I ! Ft-et, 



VOL. XIV. PART 11. 



6r 



