Biotite, containing haloes, 223; pleochroism of, 235; intensified
pleochroism in halo, 235.
Body and mind, as manifestations of progressiveness of the
organism, 86.
Boltwood, age of minerals by lead ratio, 20.
Bose, theory of latent image, 203.
Bragg and Kleeman, on path of the alpha ray, 215; stopping power,
219; laws affecting ionisation by alpha rays, 220; curve of
ionisation and structure of the halo, 232.
Brecciendecke, sheet of the, 154.
Brdche, sheet of the, 154.
Burrard and Hayden on the Himalaya, 138; sections of the
Himalaya, 139.
C.
Canals and "canali," 166; curvature of, and path of a satellite,
188 _et seq._; double and triple accounted for, 186, 187;
doubling of, 195; disappearance and reappearance of, 196-198;
photography of, 198; not due to cracks, 167; not due to rivers,
167; of Mars, double nature of, 166, 170; crossing dark regions
of planet's surface, 168; of Mars, Lowell's views on, 168 _et
seq._; shown on Lowell's map, investigation of, 192 _et seq._;
radiating, explanation of, 193, 194; number of, 194; developed by
secondary disturbances, 194; nodal development of, due to raised
surface features, 195.