{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The Practical Assayer, Containing Easy Methods for the Assay of the Principal Metals and Alloys, Principally Designed for Explorers and Those Interested in Mines [1874]","author_name":"Oliver North","thumbnail_url":"https://www.ebooknetworking.net/books/111/258/big1112584110.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1112584110.html\">The Practical Assayer, Containing Easy Methods for the Assay of the Principal Metals and Alloys, Principally Designed for Explorers and Those Interested in Mines [1874]</a>","width":400,"height":300}