01-07-2023, 08:59 PM
I found this in Carl Herrmann Gravel. Fontina Bernhardi revelata, 1750.
1. It is a mineral magnet, which attracts all metals to itself, as the common magnet does iron, and with which all mines can also be found, if one only makes a little rod of it, as in another common compass, and sets it on a point, then places it on the ground and in the place where one believes that there might be metals. Then one observes where the pointer is directed, and there, on the opposite line, one holds out to it a piece of fine gold; and if the mine is of gold, the pointer will stand still; but if it is a worse metal, it will push the opposed gold around and away from itself, since one can then put the gold away, and in the same way make an experiment with silver and all the other metals until one discovers what metal the mine has in it.
It may throw some light on the strange apparatus.
1. It is a mineral magnet, which attracts all metals to itself, as the common magnet does iron, and with which all mines can also be found, if one only makes a little rod of it, as in another common compass, and sets it on a point, then places it on the ground and in the place where one believes that there might be metals. Then one observes where the pointer is directed, and there, on the opposite line, one holds out to it a piece of fine gold; and if the mine is of gold, the pointer will stand still; but if it is a worse metal, it will push the opposed gold around and away from itself, since one can then put the gold away, and in the same way make an experiment with silver and all the other metals until one discovers what metal the mine has in it.
It may throw some light on the strange apparatus.
Adam McLean