inherent attribute of canals, [209].
Blue band, surrounding polar caps, [39], [40], [42], [43], [56], [61], [63], [71], [161],
Blue-green areas (see Dark Regions), [32], [67], [163];
taken for seas, [110].
British Nautical Almanac, [35].
Brontes, development of, [304-312].
Cambrian era of Earth, [139].
Camera, the, [272];
advantage of, [273];