Visual Materials
C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Construction schedule chart for 1923
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Rate Reduction Chart for 1937.
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Copy: Eye test chart for Backus.
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Chart of domestic base rates for Hoxie.
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - A chart of cost current for one year.
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Chart showing cost of electricity for various lamps
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