ugh a duplicate set it is only by the slower and more carefully watched process the gas and air enter the furnace at a temper- of flues and checker-work, exactly similar to those and manipulated open-hearth process that these quali- ature of from 1,500 to 1,800 degrees. As soon as the through which… … to twelve hours for each ed up as gun steel is sub- CASTING AN ARMOR-PLATE INGOT. heat, and the operator can tell at any time jected to fluid compression, which is de- signed to remove certain defects that are just what is the chemical condition of the heat, and can control with the greatest common…
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