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XXV

XV,

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PAGE

PAGE

American Pipe and Construction Co. vii

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raphy

xxvi

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Third cover page

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Bancroft & Brother, Insurance,

neering Societies . .

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Philadelphia,

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cal Measuring Instruments,

Philadelphia

vii

Philadelphia

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Link-Belt

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Co., Conveying Ma-

xxvii

chinery, etc.

Gears, Philadelphia ·

vi

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etc., Philadelphia

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Boyden Premium.

xvii

Philadelphia

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delphia

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Commercial Photo Engraving Co.

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