10-inch crown-glass element for rear doublet of Boyden telescope
Date: 1889
Inventory Number: 1996-1-0470a
Classification: Lens
Subject:
Maker: Alvan Clark and Sons (1846 - 1958)
User: Solon I. Bailey (1854 - 1931)
User: William Henry Pickering (1858 - 1938)
User: Boyden Station, Arequipa (1891 - 1927)
User: Harvard College Observatory (founded 1839)
Cultural Region:
Place of Origin:
City of Use:
Dimensions:
crown-glass element: 26.6 × 26.6 × 0.7 cm (10 1/2 × 10 1/2 × 1/4 in.)
Material:
Description:
This is the crown-glass element of the 10-inch doublet from a photographic telescope. It is bi-convex with edges colored with red rouge.
A postage-stamp lens spacer was still attached to the edge of the element when it was first pulled from its storage sleeve. It fell off quickly, however, and is currently stored separately in a mylar sleeve. (It was filmed in place on the lens.)
A postage-stamp lens spacer was still attached to the edge of the element when it was first pulled from its storage sleeve. It fell off quickly, however, and is currently stored separately in a mylar sleeve. (It was filmed in place on the lens.)
In Collection(s)
Signedunsigned
Historical AttributesThis is the crown-glass element of a 10-inch doublet lens that was the rear-end combination of a pair of doublet lenses that made up a photographic refractor paid for by the Boyden Fund. The Boyden Fund was given to Harvard College Observatory in 1887. This instrument was made about 1889 by Alvan Clark & Sons.
The 10-inch Boyden photographic telescope was likely one of the HCO instruments used in the high-altitude observatory in Arequipa, Peru, which was called the Boyden Station. It was used for photography of stars and the like.
After work in the field, the instrument was stored at the Agassiz Station. It was retrieved from there on May 21, 1969.
The 10-inch Boyden photographic telescope was likely one of the HCO instruments used in the high-altitude observatory in Arequipa, Peru, which was called the Boyden Station. It was used for photography of stars and the like.
After work in the field, the instrument was stored at the Agassiz Station. It was retrieved from there on May 21, 1969.
ProvenanceHarvard College Observatory, purchased circa 1889; gift to CHSI in 1969.
Published ReferencesDeborah Jean Warner and Robert B. Ariail, "Alvan Clark & Sons: Artists in Optics, 2nd ed. (Richmond: Willmann-Bell, 1995), 108, 206.
Bessie Zaban Jones and Lyle Gifford Boyd, The Harvard College Observatory (Cambridge: Belknap Press, 1971).
