The Lock-and-Lake Canal Approved - p130

doi:10.1038/scientificamerican02131909-130

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Cuba's Debt to our Engineers - p130

doi:10.1038/scientificamerican02131909-130a

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Congress and Military Aeronautics - p130

doi:10.1038/scientificamerican02131909-130b

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The High-Pressure Fire Automobile - p130

doi:10.1038/scientificamerican02131909-130c

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The New York Motor Boat Show - p130

doi:10.1038/scientificamerican02131909-130d

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Engineering - p131

doi:10.1038/scientificamerican02131909-131

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Electricity - p131

doi:10.1038/scientificamerican02131909-131a

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Science - p131

doi:10.1038/scientificamerican02131909-131b

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Projecting Moving Pictures in the Light - p132

Jacques Boyer

doi:10.1038/scientificamerican02131909-132

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An Egyptian Steam Cultivator - p133

doi:10.1038/scientificamerican02131909-133

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The Opposition of Mars in 1909 - p134

Frederic R. Honey

doi:10.1038/scientificamerican02131909-134

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The Practical Side of Aerial Locomotion - p135

doi:10.1038/scientificamerican02131909-135a

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Comparison of Wright and Voisin Aeroplanes - p135

doi:10.1038/scientificamerican02131909-135b

PDF (120 KB)

More Curious Facts about Numbers - p135

doi:10.1038/scientificamerican02131909-135c

PDF (120 KB)

The Aurora Borealis and Morehouse's Comet - p135

doi:10.1038/scientificamerican02131909-135d

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Magnetism and the Aurora - p135

doi:10.1038/scientificamerican02131909-135e

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Novel Life-Saving Apparatus - p136

doi:10.1038/scientificamerican02131909-136

PDF (159 KB)

Road Building by the United States in Cuba - pp136 - 138

William Atherton Du Puy

doi:10.1038/scientificamerican02131909-136a

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Photographing Animals under Water - pp138 - 139

Jacob Reighard

doi:10.1038/scientificamerican02131909-138

PDF (608 KB)

A New Direct-Reading Photometer - p139

doi:10.1038/scientificamerican02131909-139

PDF (167 KB)

A $250 Prize for a Wet-Grain Conveying System - p140

doi:10.1038/scientificamerican02131909-140

PDF (227 KB)