{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The Ventilation of Mines: Designed for Use in Schools and Colleges; and for Practical Mining Men in Their Study of the Subject [ 1894 ]","author_name":"James Thom Beard","thumbnail_url":"https://www.ebooknetworking.net/books/111/234/big1112343784.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1112343784.html\">The Ventilation of Mines: Designed for Use in Schools and Colleges; and for Practical Mining Men in Their Study of the Subject [ 1894 ]</a>","width":400,"height":300}