3 Free Photos of Negative Pole

historyhistoricalcivil war glass negatives
9-volt battery positive pole negative pole
vintagestack
Wagon parked near a telegraph pole in foreground with a camp in the background LCCN2012648030
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Washington, D.C. Signal Corps officers lowering flag at their camp near Georgetown; Gen Albert J. Myer, in civilian dress, at right of pole LOC cwpb.04174
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