TUCSON, Ariz. (KGUN) — As monsoon season sweeps across Arizona, lightning strikes become more frequent—and more dangerous. While commercial buildings are required to have protective systems, homes ...
Spratt lightning rod point, 1850, marked: "J Spratt / Platinum Silver / Patent Jan 8, 1850". The marking refers to US Patent 7008, "Improvements in Alloys for Points of Lightning-Rods," issued to ...
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