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https://www.nist.gov/news-events/news/2016/11/national-aviation-history-month-earth-inductor-compass
National Aviation History Month: Earth Inductor Compass | NIST
In 1922 NIST physicists Lyman Briggs and Paul Heyl were awarded the Magellan Medal from the American Ph
earth inductor compassnational aviationhistory monthnist