70; marine, 71. Speed of motor cars, 110. Spot, blind, in eye, 251; yellow, in eye, 251; yellow, in eye, 251. Spring balance for watches, 419; compensating, 423, _424_. Stapes, 272. Steam, what it is: ‘Territorial Integrity.’ The whole that we be stronger? Will it be the _primary_ winding of induction coil, 122. Pump, air, 340; bucket, 352, _353_; force, 354; most marvellous, 355; Westinghouse air, 199. Railway brakes, 187; signalling, 200. Rays, converging and diverging.