This story is under construction. Please check back later
Last reviewed and revised June 20, 2002(When writing my articles, I have tried to be conscious of the time it takes to view them. Some modelers only have a dial-up connection to the Internet and sizeable image files imbedded in the text can slow viewing down quite a bit. To counteract this, I have kept my images hidden behind key words in the text so that you view them only when you click on those words. This also has the benefit of opening a seperate window with the image in it so that the text and the image can be viewed side by side. As a result, imbedded in this article you will find some underlined words that hyperlink you to photographic images illustrating the point being made. I have deliberately tried to keep the image files small so, necessarily, the images are pretty low resolution but I hope that they help in any case. Enjoy!)
