By
means of these high-speed tools the United States was able to turn out
five times the munitions that it could otherwise have done in the same
time. On the other hand, if Germany alone had possessed the secret of
the modern steels no power could have withstood her. A slight
superiority in metallurgy has been the deciding factor in many a battle.
Those of my readers who have had the advantages of Sunday school
training will recall the case described in I Samuel 13:19-22.
By means of these new metals armor plate has been made
invulnerable--except to projectiles pointed with similar material.
Flying has been made possible through engines weighing no more than two
pounds per horse power. The cylinders of combustion engines and the
casing of cannon have been made to withstand the unprecedented pressure
and corrosive action of the fiery gases evolved within. Castings are
made so hard that they cannot be cut--save with tools of the same sort.
In the high-speed tools now used 20 or 30 per cent, of the iron is
displaced by other ingredients; for example, tungsten from 14 to 25 per
cent.
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