Nickel Steel in Boiler Construction - p146

doi:10.1038/scientificamerican09021899-146

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Trolley Cars on Grades - p146

doi:10.1038/scientificamerican09021899-146a

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The Statistics of our Vast Railroad System - p146

doi:10.1038/scientificamerican09021899-146b

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Weight of Mail Matter in the United States - pp146 - 147

doi:10.1038/scientificamerican09021899-146c

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The American Association for the Advancement of Science - p147

Horace C. Hovey

doi:10.1038/scientificamerican09021899-147

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Copper Coins Melted up - p147

doi:10.1038/scientificamerican09021899-147a

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The Allegheny Observatory Objective - p147

doi:10.1038/scientificamerican09021899-147b

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An Improvement in Rotary Engines - p148

doi:10.1038/scientificamerican09021899-148

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A New Acetylene Gas Generator - p148

doi:10.1038/scientificamerican09021899-148a

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An Ingenious Mowing-Machine-Sickle Grinder - p148

doi:10.1038/scientificamerican09021899-148b

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Present and Proposed Cruisers of the United States Navy Compared - pp149 - 150

doi:10.1038/scientificamerican09021899-149

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Ice Manufacture on a New System - p151

doi:10.1038/scientificamerican09021899-151

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Removal of a Famous Engineering Landmark - pp152 - 153

doi:10.1038/scientificamerican09021899-152

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The Last Eruption of Mauna Loa - pp153 - 154

Enos Brown

doi:10.1038/scientificamerican09021899-153

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Ancient Egyptian Versus Modern Pin Locks - p155

doi:10.1038/scientificamerican09021899-155

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To Inventors - p157

doi:10.1038/scientificamerican09021899-157

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