This distinction between science and history has its origins in 19th-century German academe, which distinguished between Naturwissenschaften (the sciences) and Geisteswissenschaften (the humanities), or between Gesetzwissenschaften (jurisprudence) and Geschichtswissenschaften (history, historiography). Generally, Naturwissenschaften and Gesetzwissenschaften refer to the study of phenomena that are governed by objective natural laws, while the latter terms in the two oppositions refer to those phenomena that have meaning only in terms of human perception or experience. In 1884, Kantian philosopher Wilhelm Windelband coined the terms nomothetic and idiographic to describe these two divergent approaches. He observed that most scientists employ some mix of both, but in differing proportions; he considered physics a perfect example of a nomothetic science, and history, an idiographic science. Moreover, he argued that each approach has its origin in one of the two "interests" of reason Kant had identified in the Critique of Judgement—one "generalizing", the other "specifying". (Winkelband's student Heinrich Rickert elaborated on this distinction in The Limits of Concept Formation in Natural Science : A Logical Introduction to the Historical Sciences; Boas's students Alfred Kroeber and Edward Sapir relied extensively on this work in defining their own approach to anthropology.)