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Book V: Underground Mining

Book V: Underground Mining Page of 673 Book V: Underground Mining Text size:minus plus Restore normal size   Mail page  Print this page
146                                      BOOK V.
as in the case of the suspended plummet level, but is fixed to the instrument in
a half-lying position. They measure the tunnels for the purpose of knowing
how many fathoms they have been increased in elevation ; how many fathoms
the lower is distant from the upper one; how many fathoms of interval is
Book V: Underground Mining Page of 673 Book V: Underground Mining
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