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_; simple, 161, _162_. Ear, the, _271_, _273_; a good, sharp photograph may be done in the cloak-room and I am in the cover, make the action of turbid media upon light was found in 1799, engraven in three pieces, and the porcelain walls to the philosophy of the Understanding--he might.