Monthly Archives: August 2017
Magical Treasure Hunting
This is a history of treasure hunting from the middle ages to the present day, rather than a how to book. Nevertheless, it is well researched and despite being written by a university senior lecturer, is quite entertaining, although biased towards Europe, as medieval North America is largely undocumented. The study leads to the conclusion […]
The Colour of the Money
Buried metals interact with the earth’s magnetic field to emit electro-magnetic radiation. Radiation seems to be emitted across a spectrum of wavelengths from Near Infrared, through visible light to Ultraviolet. Different metals may have different dominant colours of radiation, as processed by the camera. This seems unrelated to the natural colour of the metal or […]
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