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Collection of discharge tubes comprising 6 spectrum tubes (Plücker form)

Collection of discharge tubes comprising 6 spectrum tubes (Plücker form), 9 decorative Geissler tubes, 14 (originally 15) tubes to show the fluorescent of various solids, 2 restricted ray tubes, 1 tube to show the rotation of the discharge in a magnetic field

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Crookes vacuum tube containing a fluorescent 'flower'

Crookes vacuum tube containing a fluorescent 'flower'

Ebert's phosphorescent lamp

Ebert's phosphorescent lamp

De la Rive's vacuum tube for demonstrating the Faraday rotation of cathode rays in a magnetic field

De la Rive's vacuum tube for demonstrating the Faraday rotation of cathode rays in a magnetic field

Spectrum tube

Spectrum tube

Spectrum tube

Spectrum tube

Puluj electrical radiometer

Puluj electrical radiometer

Holtz 'restricted ray' vacuum tube

Holtz 'restricted ray' vacuum tube

Crookes vacuum tube containing a fluorescent screen

Crookes vacuum tube containing a fluorescent screen

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Geissler tube

Geissler tube

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Spectrum tube

Spectrum tube

Crookes vacuum tube containing mineral samples

Crookes vacuum tube containing mineral samples

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube for demonstrating the properties of cathode rays

Crookes vacuum tube for demonstrating the properties of cathode rays

Geissler tube

Geissler tube

Holtz 'restricted ray' vacuum tube

Holtz 'restricted ray' vacuum tube

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Spectrum tube

Spectrum tube

Spectrum tube

Spectrum tube

Spectrum tube

Spectrum tube

Crookes vacuum tube containing a mineral sample

Crookes vacuum tube containing a mineral sample

Geissler tube, large grid-iron pattern on wooden stand, partly of uranium glass, probably made in Germany

Geissler tube

Geissler tube, helical pattern, partly of uranium glass, probably made in Germany, (both connecting loops broken)

Geissler tube

Geissler tube, small, with S bend, partly of uranium glass, probably made in Germany (one connecting loop broken)

Geissler tube

Geissler tube, 'square' pattern, partly of uranium glass, probably made in Germany

Geissler tube

Geissler tube, double spiral pattern, partly of uranium glass, probably made in Germany (one connecting loop broken)

Geissler tube

Geissler tube, cylindrical pattern with fluorescent liquid sealed between inner and outer tubes, partly of uranium glass, probably made in Germany

Geissler tube

Geissler tube, rectangular ziz-zag pattern, partly of uranium glass, probably made in Germany (one connecting loop missing)

Geissler tube