Presents for the first time in English, this 1967 text which came to be known as the 'bible' of a new movement in German philosophy of language, the 'Erlanger School.' This school of linguistic philosophy's treatment of language is rooted in the tradition of transcendentalism, and bases its system on Kant and his Continental successors. For the Erlanger School, 'language is not just a fact we discover...but a human cultural accomplishment whose construction reason can and should be controlled.' An influential work which will be a valuable resource for students of philosophy, particularly philosophy of language and transcendentalism.