The article deals with Franjo pl. Marković's comprehensive manuscript on logic (written by the end of the nineteenth century) and with Gjuro Arnold's high-shool textbook on logic (five editions published from 1888 to 1923). Those works both represent an intermediary standpoint between the formalism and the realism in logic. Besides, Arnold's position also stresses the voluntary aspect and a subjectivistic apriorism (especially in the 4th and Sth editions). Both the authors lean on herbartian logics, as well as on J. S. Mill (even though his influence is much more present in Marković's work), H. Lotze and W. Wundt (whose influence is particularly visible in the last two editions of Arnold's work). Compared to Arnold's book, Marković's manuscript, which was meant for the university students, deals with all the relevant logical literature of the time much more comprehensively, including the mathematical logic that was just being developed at the time. In the notes included in the 4th and 5th editions of his Logic, Arnold refers to the discussion between the psychologism and logicism. It should also be stressed that Marković's Logic is particularly interesting as a rich treasury of logical terminology.