158 



BULLETIN 42, UNITED STATES NATIONAL MUSEUM. 



The collection iucliules a very complece series of the pig metals of 

 differcut grades and two samples of slag. 



Fit/ iron. 



Graile. 



No.l D 3.75 



No.2 I) 3.4- 



No. 2 D 3. 25 



No.3 T> 2,7 



No.3 D 2.7 



Siliceous D 5.4 



Ko.l j C 3.5 



No.l iC or 1) 4.1- 



No.2 1 C 3.0 



No.3 1 C 2.7 



Furnace. Silicon. 



Sulphur. 



Trace. 



0.024-0.048 

 0.02 

 0.09 

 0.0t)3 

 0.00 

 Trnce. 



0.023-0.025 

 0.03 

 0. 023 



Pho.sphoiua. 



0.11 



U.0G3- 0.004 

 0. 105 

 0.07 

 0. 063 

 0.065 

 0. OU 



U. 055 - 0. 050 

 0.09 

 0.003 



(55411) 

 (55412) 

 (55413) 

 (55414) 

 (55415) 

 (55410) 

 (.55417) 

 (.J5418) 

 (55419) 

 (55420) 



Slag, produced iu making No. 1 pig-irou. (55408.) 

 Slag, produced in makiug No. 3 pig-iron. (.55409.) 



ROANE IRON COMPANY. 



The blastfurnaces of this company are located at Eockwood, Roane 

 County, Tennessee. There are two furnaces 65 feet by 10 feet and 65 

 feet by 14 feet, supplied with iron jjipe blast stoves. The ores used 

 consist of the local fossil ores. The finx is a limestone quarried on 

 the bank of the Tennessee River near the furnaces, and the fuel is coke 

 made from a coal mined near the furnace. 



The charges in the furnaces are : 



Kaw coal 



Coke 



Limestone 



( § Compauy 

 Oi'^^iWelckei 

 Mill cinder 



Pressure of blast, :H pounds to 3} pounds. Teuiperatun; of blast, 9.50"^ F. 



The collection was taken by Mr. M. M. Duncan, superintendent, 



August, 1884, and shows : 



Ori'. 



(\) Ik-niatite, fo.ssil ore. Kockwood Mines, Koi.iie County, Tennessee. (545<;7.) 

 (2) Hematite, soft fossil ore. Crescent Mine, Roane County, Tennessee. (5452G.) 

 (:!) Hematite, hard fossil ore, taken 20 feet below the surface. Crescent Mine, 

 Roiine County, Tennessee. (54523.) 



(4) Hematite, soft fossil ore. Welcker Mine, Koaue County, Tennessee. (5453L) 



