“The main Business of natural Philosophy”

Chapter 1 Newton and Causes: Something Borrowed and Something New

Chapter 2 Uncovering the Methodology of the Principia (I): The Phase of Model Construction

Chapter 3 Uncovering the Methodology of the Principia (II): The Phase of Model Application, Theory Formation and Theory Application

Chapter 4 Facing the Limits of Deductions from Phenomena: Newton’s Quest for a Mathematical-Demonstrative Optics

Chapter 5 Uncovering the Methodology of the Principia (III): A Brief Chronology of Newton’s Methodological Itinerary

Chapter 6 “To Treat of God from Phenomena”