I had been noticing a whole series of lightning rods mounted on roof peaks at a nearby shopping mall. They all looked like this: Figure 1 Lightning rod mounted on roof peak. I wondered what purpose ...
Lightning rod with glass globe and weather vane, no glass in vane, 9-point star on top, 2 ceramic ring insulators. "R.[or B?] H. B.[?] & Co. No. 73" molded on insulator, "Cole Bros Pat. Dec. 12-1893" ...
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