Francois Couperin (1668-1733), now well-nigh forgotten, although once mentioned in the same breath with Moliere, wrote the pioneer clavier instruction book. In it he directs scholars how to avoid a harsh tone, and how to form a legato style. He advises parents to select teachers on whom implicit reliance may be placed, and teachers to keep the claviers of beginners under lock and key that there may be no practicing without supervision. His suggestions deserve consideration to-day. He was the first to encourage professional clavier-playing among women. His daughter Marguerite was the first woman appointed official court clavier player. He composed for the clavier little picture tunes, designed to depict sentiments, moods, phases of character and scenes from life. He fashioned many charming turns of expression, introduced an occasional tempo rubato, foreshadowed the intellectual element in music and laid the corner-stone of modern piano-playing. Jean Philippe Rameau (1683-1764) continued Couperin's work. What is generally recognized as the first period of clavier-virtuosity begins with the Neapolitan Domenico Scarlatti (1683-1757), and Johann Sebastian Bach (1685-1750), the German of Germans. The style of Scarlatti is peculiarly the product of Italian love of beautiful tone, and what he wrote, though without depth of motive, kept well in view the technical possibilities of the harpsichord. His "Cat's Fugue," and his one movement sonatas still appear on concert programmes. In a collection of thirty sonatas he explained his purpose in these words: "Amateur, or professor, whoever thou art, seek not in these compositions for any profound feeling. They are only a frolic of art, meant to increase thy confidence in the clavier." In Germany, with grand old Father Bach, the keyboard instrument was found capable of mirroring a mighty soul. The germ of all modern musical design lies in his clavier writings. It has been aptly said of this master of masters that he constructed a great university of music, from which all must graduate who would accomplish anything of value in music. Men of genius, from Mozart to the present time, have extolled him for the beauty of his melodies and harmonies, the expressiveness of his modulations, the wealth, spontaneity and logical clearness of his ideas, and the superb architecture of his productions. Students miss the soul of Bach because of the soulless, mechanical way in which they deface his legacy to them.