Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 698
sand is thrown on when the metal is only at the full red heat, it falls off without adhering ; butwhen the white heat is approached, the sand begins to adhere to the iron; it next melts on its surface,over w hich it then runs like fluid glass, and defends it from the air; when this point has been… … FORGING. however, considered a sign of a dirty fire or bad iron, as the purer the iron the less it is subject t<waste or oxidation in the course of work. In welding two pieces of iron together, care must be taken that both arrive at the welding heat atthe same moment; it may be necessary to keep…
Mechanical engineering · Mechanics · Engineering
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