Re: New at Piping Design Central: 14 June 2002

>Interesting use of piping and air pressure: Diaphones were a once familiar
>sound heard throughout the Great Lakes from the early 1920s until the late
>1960s / early 1970s when most lighthouses were automated.
Cape Henry light had a diaphone. You never heard such a sound in your life, especially when you woke up at night with a hellacious thunderstorm blowing, lightning flashing and this moaning bellow blasting at intervals.

Christopher Wright P.E.    |"They couldn't hit an elephant at
chrisw@skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)