Modern Searchlights - p129

Frank C. Perkins

doi:10.1038/scientificamerican08221903-129

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The New Chemistry - p130

doi:10.1038/scientificamerican08221903-130

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Fire Peril on Underground Railroads - p130

doi:10.1038/scientificamerican08221903-130a

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Foreign Gas Engines at the World's Fair - pp130 - 131

doi:10.1038/scientificamerican08221903-130b

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The Mandatory Blue Print - p131

Egbert P. Watson

doi:10.1038/scientificamerican08221903-131

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N-Rays Discovered by M. Blondlot - p131

doi:10.1038/scientificamerican08221903-131a

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Langley's Aerodrome Experiments - p131

doi:10.1038/scientificamerican08221903-131b

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The Hudson River Tunnel - pp132 - 133

doi:10.1038/scientificamerican08221903-132

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The Beaver as a Dam-Builder - pp133 - 134

doi:10.1038/scientificamerican08221903-133

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Borelly's Comet - p135

Mary Proctor

doi:10.1038/scientificamerican08221903-135

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Observations of Borelly's Comet at Lick Observatory - p135

W. W. Campbell

doi:10.1038/scientificamerican08221903-135a

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The Making of a Lead Pencil - p137

doi:10.1038/scientificamerican08221903-137

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Alfalfa on Western Cattle Ranges - p138

Day Allen Willey

doi:10.1038/scientificamerican08221903-138

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Flowers of Prey - p139

J. Carter Beard

doi:10.1038/scientificamerican08221903-139

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Business and Personal Wants - p140

doi:10.1038/scientificamerican08221903-140a

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