I remember reading this in high school, for a book report. It is a great source of inspiration. I'm glad it's now online. Thomas Edison is also one of the historical figures I admire most. (An online biography here: http://www.gutenberg.org/catalog/world/readfile?fk_files=217855 or here: http://www.gutenberg.org/files/820/820-h/820-h.htm)