{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A Practical System of Mental Arithmetic: Or, a New and Infallible Method of Making Calculations by the Mere Action of a Thought. 1St Lond. Ed., Stereotyped","author_name":"John White","thumbnail_url":"https://www.ebooknetworking.net/books/114/616/big1146167725.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1146167725.html\">A Practical System of Mental Arithmetic: Or, a New and Infallible Method of Making Calculations by the Mere Action of a Thought. 1St Lond. Ed., Stereotyped</a>","width":400,"height":300}