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American Black Bear, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Unidentified monkey in cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Unidentified monkeys, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Male and female unidentified monkeys sitting in wood enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Polar Bear (Ursus maritimus) in cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Polar Bear (Ursus maritimus) in cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Visitors looking at Polar Bear (Ursus maritimus) walking along the floor of his cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Zookeeper smoking his pipe while feeding two bears who are standing upright, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Zookeeper smokes his pipe while feeding bears, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Cougar sitting on a ledge in a cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Cougar in a cage, two men looking in from outside, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Cougar in a cage with bars, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
Cougar in a cage with several men and women looking at it through the bars, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Cougar in a cage with bars, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Cougar in a cage with several men and women looking at it through the bars, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Male lion, in a cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Lions, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Leopard in cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Tiger in cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Tiger in cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Tiger, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Zebra (probably Grant's), in outdoor fenced enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Emu, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Zebra and emu in adjoining cages, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Zebra [Grant's?], Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Zebra [Grant's?]. A gentleman visits a zebra, which is in a caged area, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Zebra. A gentleman visits a zebra, which is ina caged area, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Camel. Hand of unidentified man pointing at camel emerging from a parted curtain, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Nilgai in outdoor fenced enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Kangaroo, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Wolf in cage, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Wolf in a cage with bars, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Wolf in a cage with bars, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Wolf in stone walled enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
Llama in outdoor fenced enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
Deer in pool of water in their enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Wolf in stone walled enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Llama in outdoor fenced enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Deer in pool of water in their enclosure, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Yak, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Yak, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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American Bison, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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American Bison, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Elephant in enclosure with roof and chain on its leg. Garden, benches, conservatory building and smoke stack in background, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
Seals or sea lions, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Elephant in enclosure with roof and chain on its leg. Garden, benches, conservatory building and smoke stack in background, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Seals or sea lions, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Egyptian Goose, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Parrot, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
White Pelican, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Parrot, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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White Pelican, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Black Swan, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Black Swan, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Cranes, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
Ostrich, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Cranes, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Ostrich, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Pheasant, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Pheasant, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Collared Peccaries, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Collared Peccaries, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)
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Rabbits, Lincoln Park Zoo, Chicago: photographer unknown, 1900 (The Field Museum Library)