Some of the recent threads have contained good ideas that were, alas,
spread out over a number of messages. I've gone back and collected things
and organized them into web documents. The documents don't contain much
beyond what you've seen on the list, but they're probably easier to follow.....
*) Why are the typical tides twice a day? Why are some tides once a
day? Making hands-on models and/or mathematical models of the
tide-producing potential. http://www.monmouth.com/~jsd/physics/tides.htm