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173 C 42.

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THESE Tracts, with the exception of the Tract of Miscellanies, I lately circulated with a view to inquiry. Since then I have, in the course of my experiments, obtained positive results, which go to establish my views on Electro-Chemistry. With Some additions to these Tracts, I now submit them to the public—presenting them, as formerly, mainly as notes for further inquiry.

MERCHISTON CASTLE BANK,
JANUARy 28, 1858.

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