Transmission, distance of, [35], [72]

speed of, [25], [35], [75]

Vibration, natural period of, [39]

Watkins, [105]

power number, [105]

Waves, damped, [30]

undamped, [30], [31]

Wheatstone bridge, [113]

Wireless apparatus, [13]

Wireless World, [31]