Seems to me that Hulda Clark in her book "Cure for All Diseases" showed
a way to see resonance of objects with a simple radionics device. I
don't myself know if I believe it works because I never could feel that
"stick" on the plate she refers to, but maybe some do, and maybe it's
real. But the device she shows how to build cost less than fifty dollars
using all radio shack parts.
Also, she is referring to the resonant frequencies of micro organisms.
But if it works for that, why not larger objects?
Bob Aldrich