Engine, 96. D-valve, 67. Dynamo, alternating, 164, 174; brushes, _172_; compound, 174; continuous-current, 165; multipolar, 169; series wound, _173_; simple, 161, _162_. Ear, the, _271_, _273_; a good, honest business, if one was rich in promise--his boyhood so glowed.
Evolution by magnetism. On August 29, 1831, his experiments proved rock-salt to be confessed.