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Copernican Armillary Sphere

Jul 6, 2024

Copernican Armillary Sphere with Central Orrery, c. 1820 Starting bid: € 1.800 | Estimate: € 2.500 – 3.500 France, brass and wood, with on an ebonised base, horizontal and vertical wooden rings, inscribed in French with “Colure des Equinoxes”,...

Branley Quadrant Electrometer

Jul 5, 2024

Branley Quadrant Electrometer, 1878 Starting bid: € 1.800 | Estimate: € 3.000 – 5.000 Consisting of a fine metal wire, a very light aluminum foil disc between four fixed brass sectors, a small mirror attached to the bottom of the suspended sector and a brass...

Bright’s Bell Acoustic Telegraph Sounder

Jul 5, 2024

Bright’s Bell Acoustic Telegraph Sounder, 1855 Starting bid: € 1.800 | Estimate: € 3.000 – 5.000 Invented by Charles Bright, with 2 sounders, galvanometer and double relays, in mahogany superstructure, 15 x 10 x 13 in. -Note: This type of device was used...

Set of Ten Astronomical Magic Lantern Slides

Jul 5, 2024

Set of Ten Astronomical Magic Lantern Slides Starting bid: € 800 | Estimate: € 1.400 – 2.400 Krüss, Hamburg. Hand-painted rackwork slides in mahogany frames, 4 x 6 ¼ in., one embossed “Krüss Hamburg”, but all from the same series, numbered A (eight...