Water Current Meter


After serving in the Union Army during the Civil War, General Theodore Grenville Ellis resumed work as an engineer in Hartford, Conn. In 1867 he was placed in charge of the U.S. Corps of Engineers navigation improvement study of the Connecticut River. For that task, in 1874, he built a current meter with four revolving cups and a four-blade rudder that was similar to, but smaller than, the current meter designed by Daniel F. Henry. The Department of Civil Engineering of the University of Wisconsin donated this Ellis meter to the Smithsonian.

Ref: Buff & Berger, Hand-Book and Illustrated Catalogue of the Engineers’ and Surveyors Instruments (Boston, 1890), pp. 61-62 and 135-137.

Arthur H. Frazier, Water Current Meters in the Smithsonian Collections of the National Museum of History and Technology (Washington, D.C., 1974), pp. 62-63 and 74-75.

Location: Currently not on view

See more items in: Medicine and Science: Physical Sciences


Exhibition Location:

Data Source: National Museum of American History

Id Number: PH.317669Catalog Number: 317669Accession Number: 231958

Object Name: water current meter

Measurements: overall: 6 7/8 in x 20 1/2 in x 6 1/8 in; 17.4625 cm x 52.07 cm x 15.5575 cm

Guid: http://n2t.net/ark:/65665/ng49ca746b2-75af-704b-e053-15f76fa0b4fa

Record Id: nmah_1816039

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