In the preliminary excavation a proton magnetometer survey was used to try and locate furnaces.
2.
This was the first systematic use of a proton magnetometer for archaeological research in North America.
3.
They used old maps and a proton magnetometer to figure out the probable location, and finally discovered it half a mile ( 800 m ) from the modern location of the river under of silt and topsoil.
4.
The "'proton magnetometer "', also known as the "'proton precession magnetometer "'( PPM ), uses the principle of Earth's field nuclear magnetic resonance ( EFNMR ) to measure very small variations in the Earth's magnetic field, allowing ferrous objects on land and at sea to be detected.
5.
In 1958 Glenn A . Black and Eli Lilly, following the work of M . J . Aitken and his associates at the Oxford University ( UK ) Archaeometric Laboratory, used proton magnetometers to locate and map buried archaeological features, including iron objects in the soil, thermoremanent magnetization of fired clays, and differences in the magnetic susceptibility of disturbed soils.
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