An extremely important invention of this time was the introduction of the chord of the dominant seventh. The discovery is usually said to have been due to Claudio Monteverde of the seventeenth century, but the earliest extant musical works, in which examples of the phenomenal chord of the dominant seventh with the full freedom of present-day practice are found, are those of Jean Mouton of Holling in Lorraine, who died about 1522. For nearly a century after this time this great discovery, like so many others in every department of science, struggled for a place. It was finally acknowledged. This discovery brought music into close relation with science, and demonstrated its foundation in the natural laws of acoustics. In his article on the History of Music in "The Encyclopaedia Britannica," Sir George A. MacFarren, Professor of Music at the University of Cambridge, declared "that the discovery of the dominant seventh lays open the principle for which pagan philosophers and Christians had been vainly groping through centuries while a veil of mathematical calculation hung between them and the truth." The curious feature of the history of its introduction lies in the fact that it failed of appreciation from orthodox musicians for a considerable period and actually met with organized opposition. Even this brief sketch will suffice to show how greatly music developed during Columbus' Century. There is probably no corresponding period in the world's history that can show as {144} much real advance that is lasting progress. Perhaps in no department of aesthetics does supposed progress come and go from generation to generation more easily than in music. What certain generations of musical critics have very highly praised is often judged by their successors quite worthless. The musical achievements of this period have, on the contrary, been beacon lights for succeeding generations. Whenever the principles that came to be accepted at this time have been much departed from, musical taste has proved false and musical accomplishment trivial. It is this sort of achievement, absolutely enduring in its quality, which above all counts for humanity, and it is nowhere so well illustrated in every department of intellectual effort as during this century of Columbus. [Illustration: GERMAN MUSICIANS PLAYING ON THE VIOLIN AND BASS VIOL (LATE FIFTEENTH CENTURY)]