Field Magnet with Polar Ring in the German Exhibit from the article ' ELECTRIC POWER AT THE WORLD'S FAIR. ' By Nelson W. Perry, E. M. from Factory and industrial management Magazine Volume 6 1891 Publisher New York [etc.] McGraw-Hill [etc.]

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Size: 1724px × 2000px
Location: Columbian Exposition Chicago Illinois1893
Photo credit: © Historic Illustrations / Alamy / Afripics
License: Royalty Free
Model Released: No

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