{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Early history of the electro-magnetic telegraph from letters and journals of Alfred Vail","author_name":"Alfred Vail, James Cummings Vail","thumbnail_url":"https://www.ebooknetworking.net/books/117/759/big1177592126.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1177592126.html\">Early history of the electro-magnetic telegraph from letters and journals of Alfred Vail</a>","width":400,"height":300}