clickable link to canal site. Why did the image disappear?
http://kyapa.tripod.com/agengineering/canaltechnology/canals.htm
If the image disappears here, it's because Tripod doesn't want pointers to their graphics-hosting servers. Something about exceeding their whopping 50 MB monthly bandwidth for all Tripod member pages. ;')
Thanks, BTW, Tripod, for offering a free 'blog on my old (1990s) site, then pulling the plug on it before I ever got to use it.