SEISMIC STUDIES of NICOLA TESLA  
                          THE TELAGEODYNAMIC PRINCIPLE 
 
      Tesla's observations in this experiment were limited to what took place 
on the floor of his of the building in which his laboratory was located, but 
but apparently little happened there until a great deal had happened  else-- 
where. The oscillator was firmly fixed to a supporting column and there were 
similar supporting columns directly under it on each floor down to the found- 
ations. The vibrations were transmitted through the columns to the ground.This 
section of the city is built on deep sand that extends down some hundreds of 
feet before bedrock is reached. It is well known to seismologists that earth- 
quake vibrations are transmitted by sand with much greater intensity than 
they are through rock. The ground under the building and around it, was there- 
fore an excellent transmitter of mechanical vibrations which spread out in 
all directions. They may have reached a mile or more. They were more intense 
near the source and became weaker as the distance increased. However, even 
weak vibrations that are sustained can build up surprisingly large effects 
when they are absorbed by an object with which they are in resonance.  A distant
object in resonance can be thrown into strong vibration whereas a much nearer
object not in resonance will be left unaffected. 
    It was this selective resonance that was apparently, operating in Tesla's 
experiment. Buildings other than his own came into resonance with the increas 
-ing tempo of his ocillator long before his own building was affected.After 
the pandemonium was under way for some time elsewhere, his immediate suround- 
ings started to come into resonance. 
     When resonance is reached the affects follow instantly and powerfully. 
Tesla knew this, so when he observed dangerous resonance effects developing 
in his building he realized he had to act fast. The oscillator was being 
operated by compressed air supplied by a motor-driven compressor that fed 
air into a tank, where it was stored under pressure. Even if the motor were 
shut off, there was plenty of air in the tank to keep the oscillator going 
for many minutes.With the vibrations reaching this dangerous amplitude, 
there was no time to try to disconnect the vibrator from the air line or to 
do anything about releasing the air from the tank.There was time for only 
one thing, and Tesla did that. He grabbed a nearby sledge hammer and took 
a mighty swing at the oscillator in hopes of putting it out of operation.He 
succeded on his first attempt. 
         Tesla never published a discription of the device, but it's con- 
struction was principally that of a piston which moved back and forth 
inside a cast iron cylinder. The only way to stop it from operating was 
to smash the outer cylinder. 
 
OTHER NOTES BY NICOLA TESLA: 
      When a heavy gyroscope, such as is used in stabilizing ships, is forced 
to turn on it's axis, it transmits a powerful downward thrust through the 
bearings in which the supporting gimbal is mounted. If a battery of such 
gyroscopes were mounted in regions where severe earthquakes take place it 
would transmit thrusts to the ground at  equally  timed  intervals and build 
up resonance vibrations in the strata of the earth that would cause earth- 
quake strains to be released. Tesla declared that he had so far devoloped 
his study of vibrations, that he could establish a new science of "Tele- 
geodynamics" which would not only deal with the transmission of powerful im- 
pulses through the earth to distant points to produce effects of large mag- 
nitude--in addition, he could use the same principles to detect distant 
objects. 
 
The above is from: "PRODIGAL GENIUS The Life and Times of Nicola Tesla" 
                    Overseas edition for the Armed Forces distributed by 
                    by the Special Services Division for the Army, and 
                    for the Navy. 
                    This edition is not available to the general public 
                    but a new edition under the same title has recently 
                    been released and can be bought at better book stores.