Easy Money

That's right, free money. I have a standing offer in most of my classes to pay 25 cents for every typographical error found. This offer applies to both the textbook's errors and errors on these webpages. If you're the first one to spot an error then you get the quarter!

This 25-cents offer begins at the start of the second week of classes.

"Woo Hoo! Easy Money!" - H. Simpson


I want to thank three groups of people who have provided web help over the years.

  • The information-technology staff at the University of Maryland and at Eckerd College (Florida) answered many questions.
  • The US taxpayers footed the bill for some excellent NASA web sites, which have influenced the pages for this course.