{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The helicopter flying-machine: an account of previous experiments, including an analysis of the author's turbine machine, with theory and deductions","author_name":"James Robertson. Porter","thumbnail_url":"https://www.ebooknetworking.net/books/B00/3YO/bigB003YOSQFA.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B003YOSQFA.html\">The helicopter flying-machine: an account of previous experiments, including an analysis of the author&#039;s turbine machine, with theory and deductions</a>","width":400,"height":300}