ir)G 



BULLETIN 12, UNITED STATES NATIONAL MUSEUM. 



The average composition of tbe pig-irou is shown by the following 

 table, tbe samples being taken from many tons of each grade. 



I'i(j-iroii. 



Silicon (Si) 



Sulpliur (S) 



Phosphorus (P) 



Conihined carhou (CC) . 



Graphite (Gr) 



Copper (Cu) 



Iron, etc., undetermined 



Total 



White. 



Per cent. 

 0.913 

 0.204 

 0.033 

 2.766 

 0.359 

 0. 784 

 94. 941 



100. 000 



Analysts, Booth, Garret and Blair. 



LONGDALE IRON COMPANY. 



The furnaces of this company are located at Longdale, Alleghany 

 County, Virginia. (See pl, xxii). The ore used is limonite mined near 

 the furnace, and the fuel is coke made from New River coal, mined at 

 Sewall, Fayette County, West Virginia. 



The collection was taken by Capt. J. E. Johnson and shows : 



Ore. 



(1) Limonite, lump ore. (55902.) 

 ('2) Limonite, line ore. (55900.) 

 (:?) Limonite, washed fine ore. (5.^)899.) 

 (4) Tailings, from washer. (55901.) 



(1) Limestone. (5590^.) 



Flux. 



Products. 



(1) Pig-iron, No. 1. (55888.) 



(2) Slag, prodnced in making No. 1 pig-iron. (55889.) 



(3) Pig-iron, No. 2. (55890.) 



(4) Slag, prodnced in making No. 2 pig-iron. (55891.) 

 (51 Pig-iron, No. 3. (55892.) 



(6) Slag, produced in making No. 3 pig-irou. (.55893.) 



(7) Pig-iron, mottled. (55891.) 



(8) Slag, showing crystallization ; prodnced in making mottled i)ig-iron. (55895.) 



(9) Pig-iron, gray forge. (5.589(5.) 



(10) Slag, produced in making gray forge pig-iron. (.5,5897.) 



Bi/-})roduct8. 



(1) Cadmia, a deposit containing zinc ; formed in the upper part of the furnace. 

 (55898. ^ 



