"2.8" . _:vb6940213 "(geology) A bed or stratum. [from 17th c.]"@en . _:vb6940215 "For many years the coal measures on the shores of Lough Allen were worked only in the most primitive fashion, and the coal was transported laboriously in the inevitable ass carts of the Irish peasant."@en . _:vb6940213 . . _:vb6940214 . _:vb6940215 . _:vb6940214 "coal measures; lead measures"@en . _:vb6940215 "1951 May, R. K. Kirkland, \u201CThe Cavan & Leitrim Railway\u201D, in Railway Magazine, page 339:"@en .