Magnetic dredger, River Thames, London.
Various shots river police using the magnetic dredger to search the river bed. They lower a magnet on a rope over side of rowing boat. The magnet is used to lift a metal bar from bed. Policemen leave a marker buoy at site of discovery.
Lovely shots of Collie dogs including champion show dogs.
Polgreen uses a prototype to demonstrate his magnarail invention.
Scientists demonstrate how a magnet can suspend an object without the two things touching.
MS of large electro magnet on crane picking up blocks of metal.
Good footage of factory workers at General Electric Company.
Scrap metal lifted by large magnet.