Ruby, fusion of, ii, 292.
Rudder, temporary, xiii, 371.f
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Ruffin, E., on calcareous manures, review of, xxx, 138.
Ruggles, D., notice of the region about Fort Winnebago, xxx, 1.f
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—, tides in the North American lakes, xlv, 18.
—, on a large trilobite, and Iowa coralline marble, xlix, 216.
Rumford, Count, biographical memoir of, xix, 28.
—, —, sketch of the early history of, J. Johnston, xxxiii, 21.