This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Hexadecimal compass by Nystrom. en Hexadecimal compass published in by John Nystrom as part of his tonal system proposal the attempt to replace the decimal by the hexadecimal system de Hexadezimaler Kompass verffentlicht von John Nystrom als Teil seines tonal system Vorschlags dem Versuch das dezimale durch das hexadezimale Zahlensystem