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The Telegraph Circuit—How the Ground Forms Part of it - p338
doi:10.1038/scientificamerican07121851-338b
New Bolt Heading and Screw Cutting Machine - p340
doi:10.1038/scientificamerican07121851-340
Machine for Boring Conical Holes in Hubs - p340
doi:10.1038/scientificamerican07121851-340b
Railroad Car Ventilation—Keeping the Dust Out - p340
doi:10.1038/scientificamerican07121851-340e
Application for an Extension of Patent - p340
doi:10.1038/scientificamerican07121851-340g
Value Given to Cotton in its Transformations - p340
doi:10.1038/scientificamerican07121851-340h
Receipt for Making M. de Baeuvillier's Wash Compound - p340
doi:10.1038/scientificamerican07121851-340i
Coal the Cause of England's Greatness—The Future Greatness of the United States - p341
doi:10.1038/scientificamerican07121851-341b
Necrology for the Last Half Century—Men of Science - p344
doi:10.1038/scientificamerican07121851-344
