Details
A lacquered-brass Geissler tube rotator,
the twin coil motor with copperised magnetic ring, contact points and conductors, raised on a wood stand with polished wood base, the square cross section arm with adjustable terminals, with sprung ends in order that the instrument can be used with Geissler tubes of various lengths between 10in. and 14in. (25.4cm. and 35.6cm.)
the twin coil motor with copperised magnetic ring, contact points and conductors, raised on a wood stand with polished wood base, the square cross section arm with adjustable terminals, with sprung ends in order that the instrument can be used with Geissler tubes of various lengths between 10in. and 14in. (25.4cm. and 35.6cm.)