  Unlike Dewey, both Christine Ladd and Oscar Howard Mitchell concentrated on formal deductive logic, i.e. mathematical logic, rather than on the informal methodology of the sciences. Also unlike Dewey, Ladd and Mitchell both published articles in the 1883 volume Studies in Logic, which was edited by Peirce. Again, in his own “Preface” to this volume Peirce singles out both Ladd and Mitchell for commentary and overt praise (p. v). To these two students of Peirce we now turn.