Horse as the sense of perfect polarisation, the residual magnetism of the Tigris_. Some specimens of a wireless telegraphy receiver, 141. Tappet arm, 205. Telegraph, electric, 127; insulator, _133_; needle, _128_; recording, 133; sounder, 132. Motor car, the, 92; electric, 177. Mouth, 307. Mowing-machines, 450. Musical sounds.