Visual Materials
C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - A chart showing Comparative Cost of Illuminants.
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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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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Work Cost Chart for new vs. reconditioned transformers.
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Chart of cost of employee purchasing protection for compensation during illness.
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C1.1 - Charts miscellaneous
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C1.1 - Charts miscellaneous - Chart of Edison stock quotations 1908 to 1922
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