Compton, Alfred G. (Alfred George), 1835-1913 · New York : J. Wiley & Sons · leaf 180
166 FIRST LESSON'S IN METAL WORKING. flame, and less heat. Holding the blow-pipe in the right hand, with the tip just outside the flame, direct the current of air from the mouth through the lower part of the flame. This will produce a long slender jet of blue flame, in which the tem¬ perature is… … run into the joint. Remove the blow-pipe, and let the work cool. In making a small joint in this wTay you must be careful — 1°. Not to use too much solder. 2°. Not to let the flame play on parts of the metal which need no heat, as it discolors them. 3°. Not to continue the heat lona;er than neces-…
Metal-work
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