We welcome comments and suggestions from users of this website. In making comments regarding the content of any of the tutorials, please reference the name of the tutorial; the date of the tutorial posting, as shown on in the upper right corner of the tutorial; and the specific page number of the material you wish to comment on (e.g. Page 2.c.4). All tutorials consist of discrete pdf files.

All comments, general and specific, should be directed to David B. Baker ( dbaker@heidelberg.edu).