{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Geometrical demonstration of the ratio of the circle's circumference to the diameter: To accompany the mechanico-mathematical instrument","author_name":"John Harris","thumbnail_url":"https://www.ebooknetworking.net/books/noimage.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0008956NY.html\">Geometrical demonstration of the ratio of the circle&#039;s circumference to the diameter: To accompany the mechanico-mathematical instrument</a>","width":400,"height":300}