mirror in nickeled tube
Date: 1925-1950
Inventory Number: 1997-1-0908
Classification: Astronomical Apparatus
Subject:
Maker: American
User: Oak Ridge Station (1931 - 2005)
User: George R. Agassiz Station, Harvard (1951 - 1982)
User: Harvard College Observatory (founded 1839)
Cultural Region:
Dimensions:
20.5 × 3.3 × 3.3 cm (8 1/16 × 1 5/16 × 1 5/16 in.)
case: 6.1 × 23.8 × 6.5 cm (2 3/8 × 9 3/8 × 2 9/16 in.)
Accessories: box
Description:
Nickel-plated brass tube, very finely made, has a small window in the center. Behind the window is a small high-quality mirror that slides up and down the tube in a track. There is a red disk on a stem that can be rotated in order to swing the disk in front of the window and block light from reflecting off the mirror. A needle probe is at one end of the tube. A rotating, plunger-like device is on the other end. The instrument has a mounting bracket near the center.
The fitted wooden box holds a nickel-plated brass spring clip and a brass screw.
The fitted wooden box holds a nickel-plated brass spring clip and a brass screw.
Signedunsigned
Inscribedstamped: 106
stamped on spring: 2
stamped on spring: 2
Curatorial RemarksMirror is no longer attached to positioning wires. Purpose unknown.
ProvenanceRetrieved from Agassiz Station courtesy of Professor Owen Gingerich (Harvard University), 5/25/81, transferred to CHSI.