""An Essay on Newton's Principia"" is a book written by W. W. Rouse Ball that provides an in-depth analysis and explanation of Isaac Newton's seminal work, ""Philosophi����� Naturalis Principia Mathematica"" (Mathematical Principles of Natural Philosophy), commonly known as the ""Principia"". The book covers a wide range of topics, including Newton's laws of motion, the law of universal gravitation, the principles...