{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Elements of natural philosophy: II. Acoustics. III. Optics","author_name":"W. H. C. Bartlett","thumbnail_url":"https://www.ebooknetworking.net/books/B00/6QQ/bigB006QQW0E6.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B006QQW0E6.html\">Elements of natural philosophy: II. Acoustics. III. Optics</a>","width":400,"height":300}