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David Brooks' Patent Exploded View This photo shows the three main components of the 1867 Brooks Patent ramshorn insulator; the metal outer shell, the glass insert, and the iron hook. The components were held together with molten sulfur. |
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David Brooks' Patent Exploded View This photo shows the three main components of the 1867 Brooks Patent ramshorn insulator; the metal outer shell, the glass insert, and the iron hook. The components were held together with molten sulfur. |
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Written Sunday, January 19, 1997; updated Tuesday, February 21, 2012