 What is distinctive about the method of the Principia is what I.B. Cohen termed the “Newtonian style”. Its constitutive feature is the mathematization of nature, i.e., “dealing mathematically with the realities of the external world”. This meant much more than deriving numerical results from experiments, or a focus on measurement, or a commitment to a means of exposition that proceeded from definitions and axioms. Instead, it meant taking mathematics as the model of reality: constructing “the mathematical analogue of a natural situation” and then to advance from this idealized case by the addition of further conditions toward more accurate mathematical analogues of actual situations (Cohen 1980: 51, 151, see also Smith 2002; Smeenk &amp; Schliesser 2013). There are no traces of this approach in Hume, so if one takes the Principia’s “Newtonian style” as the essence of Newton’s method, then one should also conclude that Hume’s experimental method is not Newtonian. (For a contrasting view see de Pierris 2015 who credits Hume with a Principia-style Newtonian inductive methodology, and for a critique of her views see Landy 2017.)