This is the OCR edition. There may be numerous typos or missing text. The book is not illustrated or indexed. However, purchasers can download a free copy of the original rare book from the publisher's website. You can also preview the book there. Purchasers are also entitled to a trial membership in the publisher's book club where they can select from more than a million books for free. Publisher: The Colliery guardian company, limited Publication date: 1898 Subjects: Coal mines and mining; Coal trade; Technology