The definitions scroller appears at the bottom of each article and summary page. It looks like this :

The scroller has three purposes :

1.	Important definitions from the topic that you are studying scroll across the bar. If you click on a definition the page that it comes from will load.
2.	The Prev Page and Next Page buttons help you work your way through all of the pages in the current topic.
3.	The page number indicator tells you how far you have got through the current topic.

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(C) P Meakin 2004