 In the work under consideration Marty argues for the thesis that space and time exist objectively as non-real entities. This thesis is maintained in opposition not only to the various philosophical systems in which space or time is regarded as subjective, e.g. as an a priori form of intuition, but also in opposition to Brentano’s later view, according to which space and time is to be regarded as a linguistic fiction used to describe real things in their various modes. While it is indeed a misfortune that Marty is relying on a discarded view from the standpoint of physics, his thesis that space and time are non-real entities must be distinguished from his Newtonian presuppositions. Just as followers of Kant have managed to adhere to his views on space and time in spite of emergence of non-Euclidean geometries and the theory of relativity, Marty’s basic ontological view on these matters can be considered apart from such developments, however important they may be.