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Opening of the World's Columbian Exposition at Chicago - p290
doi:10.1038/scientificamerican05131893-290
The Electric Systems at the Columbian Exposition - pp290 - 291
doi:10.1038/scientificamerican05131893-290b
The Post Office of the Columbian Exposition - p291
doi:10.1038/scientificamerican05131893-291
Notes from the Worlds Columbian Exposition Chicago 1893 - p291
doi:10.1038/scientificamerican05131893-291a
A Steam Pressure and Water Level Recorder - p295
doi:10.1038/scientificamerican05131893-295a
Edison's Improvement in the Transmission of Power - p296
doi:10.1038/scientificamerican05131893-296
The Columbian Exposition Steamer Christopher Columbus - pp297 - 298
doi:10.1038/scientificamerican05131893-297