Locke Level

Description:

John Locke, a scientist in Cincinnati, Ohio, described a reflecting level at a meeting of the Association of American Geologists and Naturalists in 1842, and obtained a patent (#7,477) in 1850. Locke's instrument consisted of a small spirit level on a brass sighting tube, with a small diagonal reflector so arranged that the user can see the bubble and a distant sight at the same time. This simple and perhaps homemade example belonged to the Anglo-American physician and scientist, William Draper (1811-1882), or one of his descendants.

Location: Currently not on view

See more items in: Medicine and Science: Physical Sciences, Surveying and Geodesy, Measuring & Mapping

Exhibition:

Exhibition Location:

Credit Line: John William Christopher Draper and James Christopher Draper

Data Source: National Museum of American History

Id Number: PH.333969Catalog Number: 333969Accession Number: 304826

Object Name: Locke Levellocke level

Measurements: overall: 7 3/4 in x 3/4 in; 19.685 cm x 1.905 cmoverall: 7 3/4 in x 1 3/16 in x 7/8 in; 19.685 cm x 3.01625 cm x 2.2225 cm

Guid: http://n2t.net/ark:/65665/ng49ca746a5-9549-704b-e053-15f76fa0b4fa

Record Id: nmah_761998

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