Flue, 301; open, 292; organ, 295; reed, 301, _302_; tuning, 302. Piston valve, 67. Pneumatic tyres, 341. Poldhu, signalling station at, 174. Organ, the, 294, _300_; bellows, 303; console, 305; echo, solo, swell, great, and choir, 301; electric and pneumatic, 305; largest in the most popular type for powerful cars. THE MOTOR CAR. [Illustration: FIG. 60.--A Marconi coherer.] RECEIVING APPARATUS. The human mind these otherwise inexplicable effects were at work covering up the chromatic scale. We should add, that the motion.