Density 21.5
Subtitle: for flute alone
By: Edgard Varèse
Publisher: Colfranc
Published: 1966
Place of publication: New York
Subjects: Flute music
Work titles: Density 21.5
Notes: Cover title.

"Written in January, 1936, at the request of Georges Barrère for the inauguration of his platinum flute. Revised April, 1946. 21.5 is the density of platinum"--P. 2.