.:AL SURVEY 



. M.l.K, PL XXXVH 



. J PERSPECTIVE VIEW 



Cast Iron Wrought Iron 



Kg. 8 SECTION ON O 6 

 Clay Strep 





Scale: i inch to 6 feel or 1:7:: 



! t. K [ 



A -( .u\-ard. Metallurgist . 



!' l-.ninioiu*, Geologist-in- 



CIRCULAR FURNACE 

 SMICLTER H. 



