CUPOLA TESTS OF COKE. 
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Iron very hot. 
Blast off 1 minute. 
Iron very hot and fluid. 
Temperature of iron medium. 
Iron hot and fluid; 27th ladle— 62 pounds at 9.51. 
Iron hot. 
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Iron very hot; 27th ladle— 104 pounds at 11.48. 
Blast off 1 minute; tap hole cut out and iron run 
over trough. Iron hot. 
Iron very hot and fluid. 
Blast on 30 minutes; no iron melted. 
Coke bed put in and blast put on for 20 minutes; 
coke would not ignite; bottom dropped without 
changing iron. 
Blast on 32 minutes; no iron melted. 
Iron cold and sluggish. 
Blast, on 20 minutes: no iron melted; bed burned 
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