The consequent decline of the British coal-tar colour industry was already well marked in 1875, and in 1886 had proceeded so far that 90 per cent of the dyes then used in Britain were of foreign ...

Core was drilled with PQ, HQ, and NQ tools, and the drill core was sawn in half, with one half submitted for analysis and one half retained as a record. Core samples were shipped to ALS Limited in ...

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