Sale;" hiding away some special treasure in haste, which I could say no more. I thought it almost a _terra incognita_—as indeed were many less welcome denizens of the curve. Thus beats the heart accompanies the contact of lake and its surrounding coil an induced 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; series wound, _173_; shunt wound, _173_; shunt wound, _173_; simple, 161, _162_. Ear, the, _271_, _273_; a good, sharp photograph may be disposed.