Northrop, B. F., fluid in hornstone, vii, 283.
Norton, W. A., Treatise on Astronomy by, noticed, xxxvi, 197.
—, on the tails of comets, xlvi, 104.f
Norton, J. P., analysis of Sillimanite, xlvi, 382.
Notices of books, see [Works.]
Nova Scotia, short notice of the minerals of, xii, 176.
—, mineralogy of, F. Alger, xii, 227.
—, geology and mineralogy of, C. T. Jackson and F. Alger, xiv, 305, with a map; xv, 132f, 201; xxii, 167.
—, fossils in the iron ore of, xv, 201.
—, scientific excursions to, from Williams College, with an account of the minerals and geology of, xxx, 330.f