University of Illinois at Chicago Century of Progress World's Fair, 1933-1934 (University of Illinois at Chicago)
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"Shown here is a milk irradiator used to put Vitamin D in milk by means of exposing the milk to ultra-violet
1. "Shown here is a milk irradiator used to put Vitamin D in milk by means of exposing the milk to ultra-violet rays. This machine is shown as a part of the Electric Light and Power Industry's exhibit on the second floor of the Electrical Building at the World's Fair."
   

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