Compositions   1869: Piano Concerto 1875: Peer Gynt 1880: Two Elegiac Melodies 1881: Norwegian Dances 1885: Holberg Suite 1906: Moods for Piano	Philosophy 1859: Mill: On Liberty 1867: Marx: Das Kapital     1883: Nietzche: Thus Spake Zarathustra   1900: Russell: Principia Mathematica 1929: Heidegger: What is Philosophy?