{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"On the periodical star [alpha] Herculis: with remarks tending to establish the rotatory motion of the stars on their axes To which is added a second ... of the comparative brightness of the stars","author_name":"William Herschel","thumbnail_url":"https://www.ebooknetworking.net/books/117/139/big117139554X.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-117139554X.html\">On the periodical star [alpha] Herculis: with remarks tending to establish the rotatory motion of the stars on their axes To which is added a second ... of the comparative brightness of the stars</a>","width":400,"height":300}