—, delicate test of, in a gaseous mixture, xvi, 397.
—, a means of resuscitating from drowning, xvi, 250.
—, respiration of, i, 95.
—, action of oils upon, xxiii, 190.
Oxygenized water, iii, 369.
Oxy-hydrogen blowpipe, see under [Blowpipe.]
— - — illumination in light-houses, xxviii, 355.
Oxyria reniformis, xlv, 29.
Oysters, ancient and modern history of, xxxii, 211.
—, fishery of, xxxii, 245.