Advertiser:

W. & L. E. Gurley  Search this

Maker:

Whitehead & Hoag Company  Search this

Physical Description:

cellulose nitrate (overall material)

Measurements:

overall: 15 cm x 15 cm; 5 7/8 in x 5 7/8 in

overall: 1/16 in x 5 13/16 in x 5 13/16 in; .15875 cm x 14.76375 cm x 14.76375 cm

Object Name:

calculating rule

Place made:

United States: New Jersey, Newark

Referenced:

United States: New York, Troy

Date made:

after 1899

Description (Brief):

Celluloid, circular slide rule for determining elevation measurements to be used with transit telescopes. It is a flat, square panel with dial attached over the center. An image of a telescope appears in black and white on the reverse. It is an advertisement for W. & L. E. Gurley, "Makers of Civil Engineers and Surveyors Instruments," a company established in 1845.

Location:

Currently not on view

Subject:

Surveying  Search this

ID Number:

2006.0098.0524

Accession number:

2006.0098

Catalog number:

2006.0098.0524

See more items in:

Medicine and Science: Chemistry

Celluloid

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Data Source:

National Museum of American History

GUID:

http://n2t.net/ark:/65665/ng49ca746ac-3d2e-704b-e053-15f76fa0b4fa

EDAN-URL:

edanmdm:nmah_1321379