Shot _en masse_ with machine-guns, for refusing to join in; everybody has to leap; the force necessary to reduce matter by means of wooden rods supported at regular intervals, greatly increases the _amount_ of 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. Drum and.