Hey -- I made an error on the homework assignment. In the Steiner text I erroneously listed page 520 as having problems on it. That should be page 529. Thanks go to Hunter for catching this! -- Andrew J. Pounds, Ph.D. (pounds at theochem.mercer.edu) Associate Professor of Chemistry and Computer Science Mercer University, Macon, GA 31207 (478) 301-5627