XIV BULLETIN 42, UNITED STATES NATIONAL MUSEUM. 



At the right are the two bag houses for the collection of fumes ; in front of these are 

 the engine and boiler houses and draft stack; at the end of the engine house are the 

 cooling tubes, through which the hot white paint passes to be cooled so that it may be 

 collected in woolen bags; near these is the water tank, and beyond is the building con- 

 taining the slag eye furnaces for purifying the fumes from the Scotch hearth furnaces, 

 which are in the building in the background at the left; at the extreme left is a small 

 building lor the storage of fuel and quicklime. 



(Cat. No. 50727, U. S. N. M. From photograph.) 



PLATE X (Page 94). 



Copper ore. — Plan on plane of belt of the workings of the Delaware Mine, Lake Su- 

 perior Copper District, Michigan, up to September, 1894. 



The full diagonal lines represent the cross veins with solid fillings. The cupriferous 

 areas or chutes are roughly outlined by the broken lines. The shaded portions represent 

 worked-out areas. 



(Cat. No. 51201, U. S. N. M. From tracing by E. B. Kirby, E. M. j 



PLATE XI (Page 140;. 



IRON. 



/' 0)1 ore. — Eogersfield Mine. 



Shows the incline going down into the mine, the pillars of ore left to support the 

 roof, and the empty spaces left after the ore has been extracted. 

 (Cat. No. 54635, U. S. N. M. From photograph.) 



PLATE XII (Page 142). 



Wrought iron smelting. — Interior of Belmont Forge, Chateaugay Lake, New York. 



The first forge at the left is in full operation; beJow the working plate can be seen the 

 cinder plate, with holes for drawingoff the cinder; to the right, on a shell^, isa piggiufor 

 dashing water on the fire when it gets too hot; at the left of the forge is the air pipe 

 going into the chimney, and on the right is the curved pipe delivering the heated air 

 to the tuyeres. Below the curved pipe of the second forge is a water box for cooling 

 heated tools. At the corner of the second forge is a shovel for handling the ore; there is 

 a bloom in this forge being reheated; be3'ond is a pile of fine ore, which supplies this 

 and the next forge. At the right is a pile of baskets of charcoal. 



(Cat. No, 54623, U. S. N. M. From photograph.) 



PLATE XIII (Page 142). 



Wrought-iron smelting. — Trip hammer run Ijy a large water wheel in the Belmont 

 Forge, Chateaugay Lake, New York. 



Used to hammer (.shing'e) the loup to 1)looms and the reheated blooms to billets. 

 (Cat. No. 54617, U. S. N. M. From photograph. ) 



PLATE XIY (Page 142). 



IROX. 



Wrought iron ametting. — Shows a group of the tools used in operating the furnace at 

 the Belmont Forge, Chateaugay Lake, New York. In the background on the left, 

 are some finished blooms. In the center, behind the tools, is a pile of baskets filled 

 with charcoal. 



(Cat. No. 5462.-5, U. S. N, M. From photograph.) 



