{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A Vortex Theory of the Electro-Magnetic Field","author_name":"Edmund Joseph Rendtorff","thumbnail_url":"https://www.ebooknetworking.net/books/114/324/big1143241215.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1143241215.html\">A Vortex Theory of the Electro-Magnetic Field</a>","width":400,"height":300}