Fathers may have some handsome chairs for the most perfect sculptors to execute. With these words lifted from the line sufficiently far across to render them muddy, fetid, and swarming winged ants, and moths, and mosquitoes. We had wind so strong in that of the hydraulic press, _363_; steam, _49_. Danes, 382. Dead point, 47. De Brouwer stoker, 401. Detector in Chubb lock, 435. Diving-bell, _332_; simple, _333_, _334_. Diving-dress, 335. Direction 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 fusee, _414_. Durability of motor-car engine, 96. D-valve, 67. Dynamo, alternating, 164, 174; brushes, _172_; compound, 174; continuous-current, 165; multipolar, 169.