There has been an ongoing discussion on another list about the above subject and many are guessing about the makeup of this compound and its properties. It seems to be the name for several compounds.
Would anyone on this list have a reference or information about the above material as it would have been defined, made, and used during the 1700's and 1800's: what makes up the compound and what its crystalline structure is.
Modern definitions will not work and I have already checked my early horological references for information and because it was so sparse, I would like more information.
Any help would be appreciated.
Regards,
Jim Moss
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