The small carbon button lights that tesla used experiment with High
Frequency excitation.
Some claim may have been the fore runner of the laser.
Soure Telsa Patents articles and Inventions of Nikola Tesla
and the Single wire lights illuminated with High frequency radio waves.
A couple of years I noticed a company in USA tried to promote the idea
as theirs ( nothing has changed the inventions of Tesla rediscovered
and claim as something new
>
Geoff
http://geocities.com/ResearchTriangle/Lab/1135
Solaris searching for natures energy sources.
Geoff Egel
18 Sturt Street
Loxton 5333
South Australia
Australia
Phone (08) (8584 5201)
Usually can be reached hereafter 6 pm local time
(Monday - Saturday)
Central Australian time
others times you cannot be certain of getting me here.
Like to hear from You, I expect this to apply only to Australian viewers