—, proposed new work on, by S. G. Morton, xxxii, 207.
—, — —, reviewed, xxxviii, 341.f
Skunk, American, iv, 391.
Sky, on the cause of the blue appearance of, B. Hallowell, xv, 360.
—, ibid, xxvi, 65.
Slates, artificial, in Russia, vii, 191.
Slate, roof, in western Massachusetts, viii, 19, 20.
—, —, in Worcester Co., Mass., xxii, 34.
—, fused to hornstone, xxxiv, 73.
Sleep of plants, xxii, 375.