—, first observation of the spots on, xxiv, 204.
—, connection of spots on, with the temperature, xii, 199.
—, —, November, 1837, D. Olmsted, xxxiii, 393.f
—, heat of spots on, J. Henry, xlix, 405.
Sunderland cave, vii, 19.
Sunsets, autumnal, influence of the great lakes on, W. Gaylord, xxxiii, 335.f
—, —, in the West, C. Dewey, xxxviii, 151; xlii, 200.
Surgical operation, extraordinary, iii, 372.
Survey of the coast of the United States, by F. R. Hassler, plans and methods in, xvi, 225.