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Twin reflecting and refracting telescopes on observatory mounting, 1885

Twin reflecting and refracting telescopes on observatory mounting, 1885

1885
Cassegrain reflecting telescope, 1762-1774

Cassegrain reflecting telescope, 1762-1774

1762-1774
Reflecting telescope with trolly stand, 1767-1768

Reflecting telescope with trolly stand, 1767-1768

1767-1768
Brass Cassegrain reflecting telescope of 3 inch aperture, with altazimuth mount, stand and accessories

Brass Cassegrain reflecting telescope of 3 inch aperture, with altazimuth mount, stand and accessories

1790-1835
Brass component from "Twin Equatorial" Telescope

Brass component from "Twin Equatorial" Telescope

1885
Cassegrain reflecting Telescope of 2 1/2-inch aperture

Cassegrain reflecting Telescope of 2 1/2-inch aperture

1756-1758
"Twin Equatorial" Telescope, 1885. Made by Sir Howard Grubb, consisting of a 20in. Reflecting Telescope and a 7in. Refracting Telescope (by Cooke) mounted together on one equatorial stand. With Grubb electric control gear

"Twin Equatorial" Telescope

1885
Brass cylinder, possibly lens for the "Twin Equatorial" Telescope, 1885. Made by Sir Howard Grubb, consisting of a 20in. Reflecting Telescope and a 7in. Refracting Telescope (by Cooke) mounted together on one equatorial stand. With Grubb electric control gear

Brass cylinder, possibly lens

1885