Scientific war work had advanced in these ways last week:
> Garand rifles need no longer be fired to line up the sights for factory tests. A new method of testing the sights, developed in the General Electric laboratories, uses a plug holding a mirror inserted in the barrel to line up images of front and rear sights on a screen. Time, ammunition and manpower are thus saved.
> The photoelectric spectrophotometer, so sensitive it can measure the light thrown on a human hand by a candle a mile away, is now used to standardize camouflage...
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