Benjamin Pulleyn was the Cambridge tutor of an English mathematician, astronomer, and physicist, whose book,Mathematical Principles of Natural Philosophy, was first published in what year? 
Benjamin Pulleyn: Benjamin Pulleyn ( ; died 1690) was the Cambridge tutor of Isaac Newton. Isaac Newton: Sir Isaac Newton {'1': ", '2': ", '3': ", '4': "} ( ; 25 December 1642 – 20 March 1726/27) was an English mathematician, astronomer, and physicist (described in his own day as a "natural philosopher") who is widely recognised as one of the most influential scientists of all time and a key figure in the scientific revolution. Isaac Newton:  His book "Philosophiæ Naturalis Principia Mathematica" ("Mathematical Principles of Natural Philosophy"), first published in 1687, laid the foundations of classical mechanics.
1687