 Despite Schlick’s conviction that Helmholtz’s view is antithetical to Kantianism, Helmholtz’s notion that the a priori in space consists of the manifold of possible orientations in space has inspired new readings of Kant’s a priori. This influence comes partly through the mediation of Hans Reichenbach, whose reading of Helmholtz was significantly different from Schlick’s (Reichenbach 1920). Reichenbach and Schlick both pointed out the relationship between the views of Helmholtz and those of Poincaré, though Schlick realizes that Helmholtz is not a conventionalist and Reichenbach may not have done (see Schlick’s note 40 to Helmholtz 1921 [1868], 34). For a discussion of Helmholtz’s influence on Michael Friedman’s reading of Kant, also influenced by Robert DiSalle, see Friedman 2000. Also see Friedman 2001, Chapter One. 