Vase pattern double geissler tube with coloured spiral within on wooden stand
1960-1980
Vase pattern double inverted geissler tube with coloured spiral within on wooden stand
1960-1980
Geissler tube
1876
Set of geissler tubes
circa 1875
Geissler tube
Geissler tube
Geissler tube
Geissler discharge tube
1901-1930