150 BUF.LETIX 1-2, UNITED STATES NATIONAL MUSEUM. 



(6) Steel slag, formed in the converter during the conversion of pig-iron into steel; 

 sample taken from under the converter, showing some metal. (.'>47r)l.) 



(7) Spiegeleisen, an alloy of iron and manganese rich in rarbou ; used to recarbur- 

 izc the bath of metal at the end of the blow. (54829.) 



(b) Spiegeleisen, an alloj'^ of iron and manganese rich in carbon : used to recarbnrize 

 the bath of metal at the end of the blow. (.')4'?'27. ) 



(9) Spiegeleisen, average sample before melting. (.'J4830. ) 



(10) Spiegeleisen, after melting. (54820.) 



(11) Coke, from Connellsville, Pennsylvania ; used to melt .sjiiegeleisen in cupola. 

 (.547()1).) 



(12) Limestone, used in melting spiegeleisen in cupola. (.")4779. ) 



(13) Spiegeleisen slag, from tiie cupola. (5475G. ) 



(14) Steel, test ingot; taken from beginning of the cast. (r>482-^.) 



(15) Steel, test ingot; drawn down under the steam hammer to one-fourth inch 

 square and then coiled cold. (54831.) 



(16) Steel, test ingot ; drawn down under the steam hammer and then coiled cold. 

 (54e3y.) 



(17) Steel slag, taken from the casting ladle after tlie metal had been tapped. 

 (547(51.) 



RAIL-2riLL SAMPLES. 



The record is continued in the rail mill a.s follows : 



3.51f p. m., tirst ingot in reheating furnace. 



4.35 p. m., first ingot out of reheating Inrnace sent to blooming train. 



4.37-J p. m., bloom enters the rolls of the rail mill after having gone through 



15 passes in the blooming. train. 

 4.39J p. m., rails leave the rolls, having gone through 7 passes in the rail train. 

 4.401 p. m., first pair of rails deposited at the end of cooling table, 2 hours and 



23 minutes after the metal was tapped from the blast furnace. 



(1) Reheating cinder, from the Siemens gas furnace for reheating. (.54762.) 



(2) Eoller scale, from rail-mill rolls. (54758.) 



(3) Roller scale, from rail-mill rolls. (54759.) 



(4) Rail, fag end of rail. (54815.) 



(5) Rail section, taken from the middle of a 120-foot length. (54816.) 



GENEJiAL ILLUSTRATIONS OF THE PROCESS. 



(1) Pig-iron, cast in a chill, showing grade No. 2^. (54825.) 



(2) Salamander, taken from the bottom of the blast furnace on blowing out. 

 (54757.) 



(3) Graphite, taken from the bottom of the blnst furnace on blowing out. (54746.) 



(4) Test ingot, drawn under the steam hammer to one-fourth inch square and bent 

 double cold, the regular test made of every blow. (54833.) 



(5) Steel slag, formed in the converter during the blow ; representative sample. 

 (.54749.) 



(6) Indiana block coal, used under the boilers of the steel house and mill. (.54780.) 



(7) Nut coal, washed, from Streator, Illinois; used in the Siemens g.as producers. 

 (54781.) 



(8) Nut coal, •washed, from Streator, Illinois: n.sed in the Siemens gas producers 

 and at the mill. (.54834.) 



REFRACTORY MATERIALS. 



(1) Benezette fire brick, used in lining the blast furnace up to the top of the bosh. 

 ■;54790.) 



(2) Clarion fire brick, used in lining the blast furnace, from the top of the bosh 

 for 29 feet. (54766.) 



