Fluidity of the earth's centre, L. Cordier, xv, 109, 117.

—, —, —, Fourier, xxxii, 1.

Fluids, compression of, xxi, 381.

—, revolving motion in, xix, 391.

—, resistance of, L. R. Gibbes, xxvii, 135.

—, —, A. Bourne, xxviii, 231.

—, resistance of, E. W. Blake, xxix, 274; xxx, 359.

—, —, Russell, xxix, 351.

—, —, G. W. Keely, xxviii, 318f; xxx, 164; xxxi, 111.

—, upward forces of, E. C. Genet, xi, 110, 339f; xii, 94, 310; xiii, 377.