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Dredging. --- Federal aid to transportation. --- Navigation. --- Bodies of water. --- Rivers.

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Canals. --- Federal aid to transportation. --- Harbors. --- Inland water transportation. --- Resolutions, Legislative. --- Navigation. --- Piers. --- Sea-walls.

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Antiquities. --- Astronomy. --- Birds. --- Botany. --- Charitable contributions. --- Discoveries in geography. --- Earthquakes. --- Electricity. --- Electromagnetism. --- Entomology. --- Federal aid to museums. --- Financial statements. --- Forests and forestry. --- Forests and forestry --- Grasshoppers. --- Insects. --- Landscape architecture. --- Learned institutions and societies. --- Lightning. --- Management. --- Meteorological stations. --- Meteorology. --- Weather forecasting. --- Models (Patents) --- Museums --- Museums. --- Natural history --- New Madrid Earthquakes, 1811-1812. --- Observatories. --- Ornithology. --- Pests --- Pest control baits. --- Physics. --- Public administration. --- Publishers and publishing. --- Bodies of water. --- Rivers. --- Trees. --- Vegetables. --- Weights and measures. --- Accidents. --- Acquisitions. --- Control.