—, gases and salts forming near Erie canal, xv, 233.
—, living antediluvial animals, xv, 233.
—, number five a favorite in nature, xvi, 172.
—, magnetic needles, improvement in manufacture of, xii, 14.
—, trilobites, xxii, 165.
—, notice of new edition of the Geological Text Book of, xxii 391.
—, remarks by D. Thomas on the views of, on the coal formations of New York, xix, 326.
Ebullition by cold, apparatus for producing, R. Hare, xxxiii, 248.f
Echinus, see [Zoology, Radiata.]
Echo, in Virginia, C. G. Page, xxxvi, 174.