He demonstrated that with a coil of wire under the magnet connected to a power oscillator and a piece of transformer iron held on to the magnet by attraction, edge on, the piece of iron vibrated at maximum amplitude at about 8 Hz.
(He; demonstrated; that) (the magnet; connected; ) (transformer iron; held on; by attraction, edge on, the piece of iron) (the piece of iron; vibrated; L:at maximum amplitude; L:at about 8 Hz)
He the magnet transformer iron the piece of iron
demonstrated connected held on vibrated
that
by attraction, edge on, the piece of iron
L:at maximum amplitude L:at about 8 Hz