Pelouze, J., on tannin, xxviii, 124.
—, on the atomic weights of simple bodies, xlvii, 188.
—, on the solubility of chlorine in water, xlvii, 191.
Peltier, on tornadoes, xxxviii, 401.
Pendulum, new compensating, W. G. Jones, xxxviii, 274.f
—, experiments on the vibrations of, with different suspending springs, W. J. Frodsham, xxxvii, 278.
—, W. J. Frodsham's improved compound, xxviii, 107.
—, portable mercurial, E. J. Dent, xxxv, 289.
—, vibrations of a mercurial, G. Baker, xlviii, 156.
—, barometric compensation of, xlvi, 393.