Change: How does this ingenious device work? The simple way to explain it would be that sound waves enter through a funnel. The vibrations from the   View changes from previous version. (Word count: 651)

Change:  If something was questioned, it was not simply one's word against another. The information could be reviewed to see if the statement in question was actually made. The other uses, directed towards entertainment, served as a foundation for the technilogical developments that followed. Ryan Morris References:References : http://inventors.about.com/library/inventors/bledison.htmhttp://en.wikipedia.org/wiki/Phonograph   View changes from previous version. (Word count: 217)

Change: link   View changes from previous version. (Word count: 1)