Page 65 - My FlipBook
P. 65
Fig. 66. Fig. 67.
JS
as: i
Fig. 68. Fig. 69.
Fig. 65.
annealing it in a gas or alcohol flame is to be condemned ; for the com-
paratively low heat obtained from these flames seems to render the metal
It should be heated in the furnace to about 2200° F.
slightly brittle.
for two or three minutes, by which process it becomes more pliable.
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