—, remarks on certain, (Cambridge, Brussels, Calton Hill at Edinburgh,) xxviii, 67, 69.
—, United States, Cambridge, xlv, 224.
—, —, at Girard College, authorized, xxxviii, 398.
—, —, in Philadelphia, in Rittenhouse Square, xl, 375.
—, —, of Hudson, Ohio, Western Reserve College, E. Loomis, xxxix, 361.
—, —, of Yale College, latitude and longitude of, xxxiv, 309.
—, instruments proper for a small, xxxviii, 185.
—, magnetical, at Dublin, xxxiv, 3.
—, —, establishment of, recommended by the British Association, xxxviii, 108.
O'Brien, L., on a case of transpiration, xxxix, 400.