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Colored Glasses to Aid Color-Blind

Waves in Steel Cause Turbine Wrecks

Special Light Sensitive Plates to Catch Mars at Lick Observatory

Harvard Astronomers in Jamaica Plan Visual Observations of Mars

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Astronomer-Artist to Observe at Yerkes Observatory

Food Palm Recommended for American Tropics

Mt. Wilson to Measure Heat from Mars

How Astronomers Will Observe Mars at Closest Approach

Forest Pests at Work in Yellowstone Park

Extensive Program Planned at Lowell Observatory