VIIl 15ULLETI\ 42, UNITED STATES NATIONAL MUSEUM. 



Page. 



Iron — C'outiiined. 



Iron ores — Continued. 



Tenth Census collection — Continued. 

 Pennsylvania— Continued. 



Cumberland County , 125 



Huntingdon Connty 125 



Blair County 125 



Bedford County 126 



Fayette County 12<) 



Delaware 12fi 



Maryland 126 



A''irginia 127 



North Carolina 128 



Georgia 129 



Alabama 130 



Tennessee 131 



Kentucky 133 



Missouri 134 



Ohio 135 



Michigan .- 136 



Marquette County 136 



Negannee Eange 137 



Menominee district 137 



Wisconsin 138 



Minnesota 138 



Colorado : 138 



California 139 



Utah 139 



Oregon 139 



Washington 139 



Extraction of iron 139 



Wrought iron 140 



Rogersfield Mine 140 



Belmont forge ^ 141 



Steel 142 



Cementation process 143 



Crescent Steel Works ; . 143 



Cincinnati Steel Works 144 



Bessemer process 144 



South Chicago Works 146 



Blast furnace 147 



Steel house 149 



Rail mill 150 



General illustrations 150 



Refractory materials 150 



Pig iron 151 



Crown Point Furnace 152 



Warwick Furnace 154 



North Cornwall Furnace 155 



Longdale Furnace 156 



Missouri Furnace 157 



St. Louis Ore and Steel Company Furnace 157 



Roane Iron Company Furnace 158 



Applic.Ttion of iron 1.59 



Fagcrsta Steel Works. Mechanical tests 159 



