The Microphone. Le Conte' s Theory of Mountain Formation. The Black Spot of Jupiter's Disk. Shifting of the Grain Belt The Antiquity of Weaving. New Coral Beds Near Sicily. Military Improvements Wanted., scientific american, 1879-01-25

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The Microphone. Le Conte' s Theory of Mountain Formation. The Black Spot of Jupiter's Disk. Shifting of the Grain Belt The Antiquity of Weaving. New Coral Beds Near Sicily. Military Improvements Wanted., scientific american, 1879-01-25

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