—, method of obtaining, from the platinum residue, F. Wöhler, xxvi, 371.
—, means of obtaining pure, E. Fremy, xlviii, 185.
Ossification of the vitreous humor, xvii, 186.
Ostræa edulis, remarks on, xxxii, 241.
—, see farther under [Zoology, Mollusca.]
Ostrich toes, xxxv, 312.
Otaheite, letter on, by J. A. Maerenhaut, xxix, 283.
—, contents of J. A. Maerenhaut's work on, xxix, 290.
Otto, on the separation of zinc from manganese, xlvii, 194.