Other than photographs and diagrams which are credited to other sources, the contents of this site are the work of Courtney Seligman, and are copyrighted by him.
      No commercial reproduction or use of any of the contents of this site is allowed without the written permission of the author. Permission is granted for use of excerpts for non-commercial purposes, as long as authorship is acknowledged, and any alterations are noted.

Linking To This Site
      The Home Page (cseligman.com/index.html) and the online text Table of Contents (cseligman.com/text/tableofcontents.htm) have fixed URLs, but all other pages (and files) may be moved, removed, or renamed at any time. I will provide redirects for such pages on request; but redirects cannot be provided for images, so direct links to images are strongly discouraged.
      All links to this site should be in a form which makes it clear to the user that they are to this site (e.g., "See cseligman.com/text/history/brahebio.htm for a biography of Tycho Brahe", or "There is a good discussion of Tycho Brahe on cseligman.com"). Uncredited links are subject to termination.