I noticed that during Black Heritage week a black band came into our company
and played music. I particularly noticed the drummer and my mind began to
wander, thinking that the heritage goes way back to early primitive days
using this device to communicate over great distances, albeit within audible
range. We also know that sinusoid signals can focus the energy into a
narrower spectrum enhancing the range. Every boy scout knows that (in the
northern hemisphere) the green stuff grows on the north side of trees and
when cut down and placed face up, a more mellow sinusoid sound is made when
banging on the trunk. Hence the origin of the technology called the "Moss
Code". :-)

Bob