{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A manual of telegraph construction: the mechanical elements of electric telegraph engineering","author_name":"John Christie Douglas","thumbnail_url":"https://www.ebooknetworking.net/books/B00/B74/bigB00B74UDRI.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00B74UDRI.html\">A manual of telegraph construction: the mechanical elements of electric telegraph engineering</a>","width":400,"height":300}