A Year's Progress on the Panama Canal - p74

doi:10.1038/scientificamerican02011908-74

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The Lessons of the Parker Building Fire - p74

doi:10.1038/scientificamerican02011908-74a

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The Enlargement of the Assouan Dam - p74

doi:10.1038/scientificamerican02011908-74b

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The Fastest Warship Afloat - p74

doi:10.1038/scientificamerican02011908-74c

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Pennsylvania Railroad Delays Improvements - p74

doi:10.1038/scientificamerican02011908-74d

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A $25,000 Prize for a Mathematical Solution - p75

doi:10.1038/scientificamerican02011908-75a

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A Strip of Territory Added to Alaska - p75

doi:10.1038/scientificamerican02011908-75b

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A Universal Bench Vise - p76

doi:10.1038/scientificamerican02011908-76

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A Motor Chair Invented by a Woman - p76

doi:10.1038/scientificamerican02011908-76a

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Chess in Three Dimensions - p76

doi:10.1038/scientificamerican02011908-76b

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Erection of the Manhattan Bridge across the East River - pp77 - 79

doi:10.1038/scientificamerican02011908-77

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An Open-Air Veneer Machine - p80

doi:10.1038/scientificamerican02011908-80

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How our Measures of Length are Tested - pp80 - 82

Herbert T. Wade

doi:10.1038/scientificamerican02011908-80a

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How we know that the Earth Rotates - p82

doi:10.1038/scientificamerican02011908-82

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A Famous Taxidermist and His Methods - p83

Harold J. Shepstone

doi:10.1038/scientificamerican02011908-83

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