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One consideration is "metal-detecting." You may have seen people with metal detectors, headphones on, deep in concentration, scanning close to the shoreline. Amateur treasure hunters or "metal ...
Places to metal detect on the Treasure Coast of Florida, where to metal detect for 1715 Treasure Fleet The following is a list of suggested beaches and areas close to where the shipwrecks of the ...
A metal detector is an instrument that detects the nearby presence of metal. Metal detectors are useful for finding metal objects on the surface, underground, and under water. A metal detector consists of a control box, an adjustable shaft, and a variable-shaped pickup coil.
Modern headphones subsequently evolved out of the emerging field of wireless telegraphy, which was the beginning stage of radio broadcasting. Some early wireless telegraph developers chose to use the telephone receiver's speaker as the detector for the electrical signal of the wireless receiving circuit. [17]
A crystal detector includes a crystal, usually a thin wire or metal probe that contacts the crystal, and the stand or enclosure that holds those components in place. The most common crystal used is a small piece of galena; pyrite was also often used, as it was a more easily adjusted and stable mineral, and quite sufficient for urban signal ...
The hoard includes almost 4,600 items and metal fragments, [8] [1] totalling 5.094 kg (11.23 lb) of gold and 1.442 kg (3.18 lb) of silver, with 3,500 cloisonné garnets [6] [9] and is the largest treasure of Anglo-Saxon gold and silver objects discovered to date, eclipsing, at least in quantity, the 1.5 kg (3.3 lb) hoard found in the Sutton Hoo ship burial in 1939.
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