The Bedford Level experiment is a series of observations carried out along a six-mile (9.7 km) length of the Old Bedford River on the Bedford Level of the Cambridgeshire Fens in the United Kingdom, during the 19th and early 20th centuries, to measure the curvature of the Earth.
Percobaan Bedford Level adalah serangkaian pengamatan yang dilakukan di Sungai Old Bedford sepanjang 6-mil (9,7 km)* di Bedford Level, Cambridgeshire Fens, Britania Raya, pada abad ke-19 dan awal abad ke-20 untuk mengukur lengkung Bumi.