Compositions   1893: Manon Lescaut 1896: La Bohème 1900: Tosca 1904: Madame Butterfly 1910: Girl of the Golden West 1924: Turandot	Philosophy 1883: Nietzche: Thus Spake Zarathustra   1900: Russell: Principia Mathematica         1929: Heidegger: What is Philosophy?