It gives me much Despair in the Design of reforming the World by my Speculations, when I find there always arise, from one Generation to another, successive Cheats and Bubbles, as naturally as Beasts of Prey, and those which are to be their Food.--Steele (6/30/1712), #444, The Spectator.
Addison, perhaps, will be read with pleasure, when Locke shall be entirely forgotten.--Hume.
Addison is forgotten.
Hume wrote before the revival of professional philosophy, and so assumed an 'equitable posterity' that was not to be. Professional philosophy has not been kind to the very best essayists--Montaigne, Bacon, and Seneca are familiar names vaguely associated with doctrines or moments (history of skepticism, fideism, crucial experiment, inductions, Stoic suicide, etc.), but they have not attracted philosophical scholarly industries. Even Hume's great essays tend to be read mostly for supporting evidence--the exception, 'Of Miracles,' the least artful or profound of the lot.
Addison gets passing, sometimes respectable mention in works devoted to eighteenth-century aesthetics (sublime, taste, etc.). Yet, together with Steele, Addison is the patron-saint of today's philosophical bloggers. He wrote (near) daily essays with a lively comments section (including trolls), and found a proper mix of familiarity and surprise in keeping readers engaged over extended period. Steel and Addison were also, despite Hume's deflationary representation of Addison in the full paragraph from which I quote above, subtle thinkers, who -- as Steele notes above -- use reflection to reform their world. They are not mere spectators.
For present purposes, I define 'philosophy of science' as the disinterested study of science with the aim of making generalizations about the nature and methods of the science(s) and scientists. Thus defined scientists can engage in philosophy of science as a kind of second-order practice within the science(s), and they have done so even before the category 'science' took on its present (post 19th century) meaning. If we except scholastic text-books and their authors, until the eighteenth century nearly all 'philosophy of science' was done by practicing scientists or natural philosophers. This changed in the eighteenth century in response to three non-trivial developments: