Babbage and Herschel, theory of mountain building, 123.
Babes (and Cornil), size of spores, 98.
Becker, G. F., age of Earth by sodium collection, 14; age of
minerals by lead ratio, 20.
Berthelot, law of maximum work, 62.
Bertrand, Marcel, section of Mont Blanc Massif, 154.
Beta rays, nature of, 246; accompanied by gamma rays, 247;
production of, by gamma rays, 247; as ionising agents, 249.
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.