Butter, depuration of, xxiv, 200.
—, preservation of, xviii, 145.
—, volatile acids of, J. U. Lezch, xlix, 202.
Butterflies, emigration of, xiv, 387.
Butyric acid from fibrin, xlviii, 186.
—, ether, action of ammonia on, xlviii, 191.
Byrne, O., mode of determining heights, xliv, 12.f
C.
Cacoxenite, analysis of, xviii, 391.
—, in New York, xl, 76.