2372 - Geissler-Type Hydrogen Spectrum Discharge Tube. Early 20th century A.D. Unsigned, of H-form, with a large spherical ballast reservoir above two vertical limbs joined by a narrow horizontal capillary; the lower electrode chambers with wire-wound terminal leads, the interior showing heavy metallic sputtering from use; accompanied by a wooden case, untested. Mentioned in a letter to the editor of Bulletin of the Scientific Instrument Society, No. 16. 2.46 kg total, 26 x 11 cm (10 1/4 x 4 3/8 in.). [No Reserve]

Geissler-Type Hydrogen Spectrum Discharge Tube. Early 20th century A.D. Unsigned, of H-form, with a large spherical ballast reservoir above two vertical limbs joined by a narrow horizontal capillary; the lower electrode chambers with wire-wound terminal leads, the interior showing heavy metallic sputtering from use; accompanied by a wooden case, untested. Mentioned in a letter to the editor of Bulletin of the Scientific Instrument Society, No. 16. 2.46 kg total, 26 x 11 cm (10 1/4 x 4 3/8 in.). [No Reserve] Acquired on the UK art market. Property of a Harwich, UK, collector. TimeLine Auctions follows a rigorous vetting process to ensure the authenticity and legality of all items, reinforcing our commitment to integrity and responsible trading. Each antiquity, antique, and coin lot undergoes thorough examination by a vetting committee of at least ten external specialists, professional trade association members, scientists, and archaeologists. See our website for more information.