Present Condition of the New York Tunnels - p482

doi:10.1038/scientificamerican12291906-482

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The President's Message on the Panama Canal - p482

doi:10.1038/scientificamerican12291906-482a

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Catechism of a Scientist - p483

doi:10.1038/scientificamerican12291906-483

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William Henry Welch - p483

Marous Benjamin, Ph.D.

doi:10.1038/scientificamerican12291906-483a

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The “Unilens” a Novel Form of Telescope - p484

doi:10.1038/scientificamerican12291906-484

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The New Lusol Lamp - pp484 - 485

Jacques Boyer

doi:10.1038/scientificamerican12291906-484a

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A Simple Experimental Dynamo - pp485 - 486

Paul H. Woodruff

doi:10.1038/scientificamerican12291906-485

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The Solution of New York's transportation problem - p486

doi:10.1038/scientificamerican12291906-486

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The Apparatus of the United States Life-Saving Service - pp488 - 489

Waldon Fawcett

doi:10.1038/scientificamerican12291906-488

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Increasing the Power of a Talking Machine by Means of Compressed Air - p490

doi:10.1038/scientificamerican12291906-490

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Eye-Spotting in Nature - pp490 - 492

Percy Collins

doi:10.1038/scientificamerican12291906-490a

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Business and Personal Wants - p493

doi:10.1038/scientificamerican12291906-493

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