Calcite Crystal Navigation

Calcite Crystal Navigation

Postby CHoff » Sun Feb 15, 2015 8:03 pm

Just finished a first reading of The Knowledge obtained at the local library. An excellent book that should be required reading for grade schools. One thing I picked up on before reading this book was that the Vikings were using calcite crystals for navigation in the far north long before the compass, no worries about magnetic interference.
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