1891] 



on the Work of Hertz. 



325 



absorber, so it is not adapted for action at a distance. In fact, I 

 doubt whether it will visibly act at a range beyond the J X at which 

 true radiation of broken-off energy occurs. If the coatings of the jar 

 are separated to a greater distance, so that the dielectric is more 



Fig. 4. 



der for Tun.ng 



Experiment with syntonic Leyden Jars. 



exposed, it radiates better ; because in true radiation the electrostatic 

 and the magnetic energies are equal, whereas in a ring circuit the mag- 

 netic energy greatly predominates. By separating the coats of the jar 



Fig. 5. 



0=r: 



Standard Hertz Radiator. 



as far as possible we get a typical Hertz vibrator, Fig. 5, whose dielec- 

 tric extends out into the room, and this radiates very powerfully. 



In consequence of its radiation of energy, its vibrations are 

 rapidly clamped, and it only gives some three or four good strong 



