There is another kind of studies which distinguished from the sometimes opposed to comparative grammar. It is known under the name of general or philosophical grammar, whose principles and observations were articulated by Port Royal and which deals with the relation of the form of language to the operations of the mind.
Michel Bréal (1886), cited in Jacek Juliusz Jadacki, Witold Strawiński. In the World of Signs: Essays in Honour of Professor Jerzy Pelc. 1998, p. 255