River EmbankmentsIllississippi Levees. A Valuable invention. A Plan for Ventilation. Rotation of Forest Crops-Are Acorns Seeds?, scientific american, 1867-08-17

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River EmbankmentsIllississippi Levees. A Valuable invention. A Plan for Ventilation. Rotation of Forest Crops-Are Acorns Seeds?, scientific american, 1867-08-17

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