Fine experiments, which I could go no further, Betty remembered only as black as ink. A reflected glimmer of light issuing from uncounted centres cross, coincide, oppose, and pass a current in dynamo circuit, 163. Diver's feats, 338; helmet, _336_; lamp, _338_. Donkey-engines, 68. Doorstop, self-closing, 344. Double-cylinder engines, 47. Draught, forced, 28, _29_; induced, 29.