Couple of easy ones for you erudite guys:
1) When did it become mandatory to notify the abandonment of a mine? And if
a List of Abandoned Mines trfers to a specific mine but does not indicate
an abandonment date , is it safe to assume it was abandoned before
notification became mandatory?
2) I came accross a reference recently to a plumbago mine that produced
graphite. I always thought plumbago to be black lead (ie a Pb compond) &
graphite is an allotrope of carbon! My Oxford dictionary doesn't help - it
says:
... black lead or graphite ... used in pencils ... (& mixed with clay to
make crucibles). Please clarify.
TYIA, Rgds,
Ken Smith.
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