Electric test gear finds new use in hiring and safety
Interactive Q and A reveals lie detectors aid industry in job interviews by spotting alertness and sabotage tendencies. Electric fences trigger block signals after rock falls, reducing railroad wrecks. Insurers cite 216 million dollars in losses from inadequate street lighting. The watthour meter underpins billing of 3.8 billion dollars in power yearly. About 1500 feet of wire run in homes, with output at 6 billion feet annually. Eight states use magnetic sweepers for tire damage, collecting six pounds per mile. Lamps exceed 200 varieties, electric thermostats guard against overheating, and sun lamps bleach scorch. A one eighth horsepower motor equals a strong farmhand. Lead is heavily used in storage batteries and cable coverings.