Chapters: Harrison Ainslie, National Coal Board, Minerals Separation, Limited, British Coal, English China Clays. Source: Wikipedia. Pages: 28. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: The firm of Harrison Ainslie Chapters: Harrison Ainslie, National Coal Board, Minerals Separation, Limited, British Coal, English China Clays. Source: Wikipedia. Pages: 28. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: The firm of Harrison Ainslie