In a message dated 3/28/2008 11:05:57 A.M. Eastern Daylight Time, jfab11 at hotmail.com writes: Hi Allen- That 1878 date (on Edison's phonautograph tracing of railroad track noise) is right. It's well documented in the 1878 Edison Papers Project book. -Jerry Fabris ============ Thanks for correcting my memory, Jerry. Do you recall the exact date that year? Allen **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15&ncid=aolhom00030000000001)