abstract:The solar compass, an astronomical instrument, was first invented and made by William Austin Burt.Mining and metallurgy, Issues 169-180 By American Institute of Mining and Metallurgical Engineers, p.
It might sound like something straight out of a Harry Potter movie, but a mysterious piece of rock salvaged from a 400-year-old wreck might turn out to be a legendary Viking "Sunstone" -- an ancient solarcompass.
