singing are variations on the Mexican National Anthem. In 1947 he conducted experiments at New York University examining the node law that prevailed at the time and showed that it had to be modified. His reasoning followed from the fact that a node is not a mathematical point but a physical point. If a violin string is stopped below halfway, the frequency of the bowed fraction is more than twice the frequency of its base note. Carrillo later extended his work on musical physics (the node law and harmonic law) in Dos leyes de física musical (Two laws of musical physics, Mexico City, 1956)In 1949, the first metamorphoser piano was made for third-tones and Carrillo brought it to the Paris Musical Conservatory the next year. In France, he met Jean-Étienne Marie, who spread Carrillo's theories in Europe. Carrillo lectured in France, Spain and Belgium. In 1951 Carrillo produced a concert in the Esperanza Iris Theatre of Mexico City to demonstrate the musical metamorphosis laws. That year, in Pittsburgh, Leopold Stokowski performed for the first time Horizontes: Poema sinfónico (Horizons: Symphonic Poem for violin, cello and harp in quarter- eighth- and sixteenth-tones). The concert was so successful that Stokowski had to repeat the complete work. Next year, Stokowski performed Horizontes in Washington, Baltimore and Minneapolis. In 1954 he donated a metamorphoser piano for third-tones to the Schola Cantorum of Paris. In 1956, France's President decorated Carrillo with the badge of Knight of the Legion of Honor. Germany's government decorated Carrillo with the Great Cross of the Order of Merit. In 1958 Carrillo showed his 15 metamorphoser pianos at the Brussels' World Exposition. They won a gold medal. Then the pianos were shown in the Gaveau Hall in Paris. Julián Carrillo, Ivan Wyschnegradsky and Alois Hába met in Paris where they were all participating in the International Congress of Music that year. Carrillo performed in concert at UNESCO. Last years From 1960 to 1965 Carrillo recorded about thirty musical works with the Lamoureaux Concerts' Association Symphony Orchestra with renowned French musicians like Jean-Pierre Rampal, Bernard Flavigny, Robert Gendre, and Reine Flachot. These records were made by Philips in Paris. Jean-Etienne Marie was the sound engineer. In 1960 Carrillo composed his Canon atonal a 64 voces (Atonal Canon for 64 Voices); the Misa de la Restauración dedicada a Juan XXIII (Mass of the Restoration dedicated to Pope John XXIII for male voices a