The Sponge Fisheries of the Bahamas - p319

J. F. Coonley

doi:10.1038/scientificamerican11211891-319

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Economy of Flight - pp320 - 321

doi:10.1038/scientificamerican11211891-320

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An Electric Lamp Cover and Switch - p322

doi:10.1038/scientificamerican11211891-322

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A Portable Hot Water or Steam Heater - p322

doi:10.1038/scientificamerican11211891-322a

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A Continuous Driving Ratchet Drill - p322

doi:10.1038/scientificamerican11211891-322b

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A Wagon Maker's Spoke Puller - p322

doi:10.1038/scientificamerican11211891-322c

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An Improved Churn - p323

doi:10.1038/scientificamerican11211891-323

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An Improved Typewriting Machine - p323

doi:10.1038/scientificamerican11211891-323a

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A Design for Easels and Other Stands - p323

doi:10.1038/scientificamerican11211891-323b

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The World's Fair Lumber and Forestry Building - p324

doi:10.1038/scientificamerican11211891-324

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Largest Dry Dock on the Great Lakes - p327

doi:10.1038/scientificamerican11211891-327

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A Steam Engine Slide Valve - pp327 - 328

doi:10.1038/scientificamerican11211891-327a

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Some Suggestions in Photography - p329

M. Hopkins

doi:10.1038/scientificamerican11211891-329

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To Inventors - p331

doi:10.1038/scientificamerican11211891-331a

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