SkeletonPlot2 applet draws a ring series and graph paper:
Mouse click and drag within tree core to move it left or right.
Mouse click and drag within top third of skeleton plot to move skeleton left or right.
Mouse click and drag within middle third of master plot to move both plots left or right.
Mouse click and drag within bottom third of master plot to move master left or right.
Click within bottom two-thirds of skeleton plot to make a mark.
Click within top third of master plot if you want to add a mark.
I'll improve colors of tree core rings soon.
I hope to put in an erase-mark feature, in case of errors.
To try another core, highlite the URL and hit enter; you'll get a new series.
As 1/13/98, the applet runs much slower than before;
I hope that's a system problem here, please tell me how fast it goes for you.
I know you'll have suggestions; I still plan lots more innovations for this myself.