MR ROBERTSON ON THE IRON MINES OF CARADOGH. 



708 



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 2. 



Fig. 3. 



Fig. 4. 



Fig. 9. 



Fig. 5. 



Fig. 6. 



Scale. 



12 C 1 



Inches. Imul'jiuj L 



7 8 e 10 



Feet. 



VOL. XIV. PART II. 



6 r 



