{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A treatise of plane trigonometry, and the mensuration of heights and distances To which is prefixed a summary view of the nature and use of ... of instruction in schools and academies","author_name":"Jeremiah Day","thumbnail_url":"https://www.ebooknetworking.net/books/117/706/big1177061562.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1177061562.html\">A treatise of plane trigonometry, and the mensuration of heights and distances To which is prefixed a summary view of the nature and use of ... of instruction in schools and academies</a>","width":400,"height":300}