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Recently Patented Inventions
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Alternative Schemes for the Panama Canal - p66
doi:10.1038/scientificamerican01201906-66b
Floating Depot for Coaling Warships - p68
Day Allen Willey
doi:10.1038/scientificamerican01201906-68
Proposed Excavation of the Panama Canal by Floating Dredges - pp68 - 70
doi:10.1038/scientificamerican01201906-68a
A Rational Method of Cooling Gas-Engine Cylinders - pp70 - 71
S. M. Howell
doi:10.1038/scientificamerican01201906-70
A Chair Designed for the Prevention of Seasickness - p72
doi:10.1038/scientificamerican01201906-72
Historical Photograph from the Sea of Japan - pp74 - 76
doi:10.1038/scientificamerican01201906-74
An Improved Form of Telephone Instrument - p76
doi:10.1038/scientificamerican01201906-76a