""An Essay On The Usefulness Of Mathematical Learning: In A Letter From A Gentleman In The City, To His Friend At Oxford"" is a book written by John Arbuthnot in 1745. The book is an essay in the form of a letter, written by a gentleman living in the city to his friend who is studying at Oxford. The author argues that mathematical learning is not only useful but also essential for a well-rounded education. He explains that mathematics is the foundation...