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Improvements in the Steam Engine by Dr. Haycraft - p220
doi:10.1038/scientificamerican04031847-220b
Bagley's Patent Extension Penholder and Pencil - p223
doi:10.1038/scientificamerican04031847-223
Improvements in the Construction and Supply of the Hydro-Oxygen Blowpipe - p224
Robert Hare, M. D., By
doi:10.1038/scientificamerican04031847-224c