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== The Nuttall Encyclopedia <ref name="term_68075" /> == | == The Nuttall Encyclopedia <ref name="term_68075" /> == | ||
<p> | <p> A mineral pitch of a black or brownish-black colour, consisting chiefly of carbon; also a limestone impregnated with bitumen, and more or less in every quarter of the globe. </p> | ||
==References == | ==References == |