The U.S. Patent Office.
Publisher: Hempler, H.H.
Subjects: Washington (D.C.), Government facilities, Ditches Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library] |
Reclaiming swamp land. Digging ditch with tractor, and laying drain tile, Wisconsin.
Photographer: Keystone View Company
Subjects: Wisconsin, Tractors, Reclamation of land, Ditches Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library] |
Sudbury River Conduit, Nov. 6, 1876, ditch in woods for temporary ... between Farm Pond and Lake Schituate showing apparatus for rating current meter. |
Sudbury River Conduit, Nov. 6, 1876, ditch in woods for temporary ... between Farm Pond and Lake Schituate showing apparatus for rating current meter. |
