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21

Nov

circa 1950. U. of C. freshman Allan Hahn (left) holds the thermos container into  which liquid nitrogen is being siphoned from a supply tank. Graduate  student Daniel Weiner operates the controls which regulate the flow of  the super cold liquid gas for experiments in the Low Temperature  Laboratory. Photo is taken in conjunction with the Science Fair.

circa 1950. U. of C. freshman Allan Hahn (left) holds the thermos container into which liquid nitrogen is being siphoned from a supply tank. Graduate student Daniel Weiner operates the controls which regulate the flow of the super cold liquid gas for experiments in the Low Temperature Laboratory. Photo is taken in conjunction with the Science Fair.

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