Afterward I scattered A few smaller objects made of various metals on the ground to determine how well (or even though) the machines would detect them and provides me a transparent audible sign they’d found something. Metal detecting is sort of a sport in another way. The author John McPhee

This information owes much of its authority to the generosity of Alan and Sandy Sadwin, who took me below their wing and into their globe to assist me have an understanding of the engineering, procedures, and ethics of metal detecting. The two are passionate detectorists and longtime associates of t