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Advertisement of a Lost Day - p227
L. H. Sigourney, By Mrs.
doi:10.1038/scientificamerican04101847-227
Bagley's Patent Extension Penholder and Pencil - p231
doi:10.1038/scientificamerican04101847-231c
Improvements in the Construction and Supply of the Hydro-Oxygen Blowpipe - p232
Robert Hare, M. D., By
doi:10.1038/scientificamerican04101847-232c