Several of you misinterpreted when the Sapling for chapter 3 was due. To avoid any issues with 12 am or pm I have extended it to 11:55 PM on Friday night. -- Andrew J. Pounds, Ph.D. (pounds_aj at mercer.edu) Professor of Chemistry and Computer Science Mercer University, Macon, GA 31207 (478) 301-5627 http://faculty.mercer.edu/pounds_aj