Ravenna Township, Portage County, Ohio - Property Map, 1874 Size:18in x 16in and the east-west position of

and the east-west position of a ship was calculated using a variety of methods including astronomical observations (comparison of the time on ship of a predictable astronomical event with the time it would have been visible at a prime meridian) and maritime clocks (the use of two clocks

London 1769-1850 Bushey Heath - Artist Nationality: British - Original Medium

0 miles above tidewater (above Lock 44)

5-Minute Quadrangle Ruleton NW quadrangle for Sherman County

Ravenna Township, Portage County, Ohio - Property Map, 1874 Size:18in x 16in and the east-west position ofMade to order print of Ravenna Township, Portage County, Ohio property map from 1874. A historical map reproduction for wall art, offices, studies, and collectors of Ohio local history.