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The Two Hundred and Fiftieth Anniversary of New York City - p424
doi:10.1038/scientificamerican06061903-424
Remarkable Efficiency of Elevated Railway Electric Service - p424
doi:10.1038/scientificamerican06061903-424a
Prof. Goodspeed on Secondary Radiation Induced by X-Rays - p425
doi:10.1038/scientificamerican06061903-425
Alkali Manufacture by Electricity from Natural Salts - p425
doi:10.1038/scientificamerican06061903-425a
A Method of Making Glass Models of Mines - p427
doi:10.1038/scientificamerican06061903-427a
The “Soo” Ship Canal System—the Fiftieth Anniversary of its Commencement - pp427 - 429
Day Allen Willey
doi:10.1038/scientificamerican06061903-427b
A New Apparatus for Determining the Resistance of Road Vehicles to Traction - pp430 - 431
doi:10.1038/scientificamerican06061903-430