Nairne Spyglass

Description
The tube of this telescope consists of two threaded wooden (mahogany) sections screwed together that measure 113 cm (closed) or 117.5 cm (fully extended). The achromatic objective lens measures 3.5 cm in diameter (or 3.4 cm clear diameter). The eyepiece consists of four lenses in a brass cylinder (5 separate brass cylinders, screwed together) with a sliding brass cover. The instrument gives gives an erect (terrestrial) image.
The "Nairne, London" signature on the sliding brass lens cover refers to the important instrument maker, Edward Nairne (1726-1806).
Ref: D.J. Warner, "Edwarne Nairne: Scientist and Instrument Maker," Rittenhouse 12 (1998): 65-93.
Location
Currently not on view
maker
Nairne, Edward
place made
United Kingdom: England, London
Measurements
overall: 101 5/16 in x 5 13/32 in; 257.302 cm x 13.716 cm
ID Number
PH*325412
accession number
256202
catalog number
325412
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Data Source
National Museum of American History, Kenneth E. Behring Center

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