A long series of papers containing experimental investigations, and entitled, "Electrodynamic Qualities of Metals," are placed in the second volume of his Mathematical and Physical Papers.
It has, in general, been adopted in France by the scholars to whom physics owe the great progress made of late years, and it has served as my guide in all my researches on electrodynamic phenomena.
The total or apparent mass that one measures is composed, therefore, of two parts: the real or mechanical mass of the molecule and the electrodynamic mass representing the inertia of the ether.
This electrodynamicattraction diminishes, therefore, the electrostatic repulsion, and the total repulsion is feebler than if the two bodies were at rest.
Moreover, as gravitation goes back to forces of electrodynamic origin, the general theory of Lorentz will apply, and consequently the principle of relativity will not be violated.
We know that the discovery of electrodynamic induction soon followed the immortal work of Ampère.
So the mechanical masses must vary in accordance with the same laws as the electrodynamic masses; they can not, therefore, be constant.
Perhaps they have, besides their electrodynamic mass, a true mechanical mass.
This is what forces us to change the definition of mass; we can not any longer distinguish mechanical mass and electrodynamic mass, since then the first would vanish; there is no mass other than electrodynamic inertia.
Among electrodynamic experiments, the most remarkable are those in which continuous rotations are produced and which are sometimes called unipolar induction experiments.
Experiment shows us that the energy of an electromagnetic field is decomposed into two parts, the electrostatic energy and the electrodynamic energy.
His work on the electrodynamic qualities of metals, thermo-electricity, and his contributions to galvanometry, were not less massive and profound.
In 1846 Weber announced his famous hypothesis concerning the connexion of electrostatic and electrodynamic phenomena.
Ampere, the rule being that the direction of the induced current is always such that its electrodynamic action tends to oppose the motion which produces it.
We would still have to deal with an electrostatic effect, and in addition an electrodynamic effect would be observed.
Accordingly, many bulbs were constructed in which the energy necessary to maintain a button or filament at high incandescence, was supplied through the glass by either electrostatic or electrodynamic induction.
Now, if anything is desirable in this case, it is to increase the frequency, and this would make it still worse for the electrodynamic effects.
Thomson, has been followed up independently by Mr. Tesla from the beginning of this study, namely, to excite by electrodynamic induction a luminous band in a closed tube or bulb.
In fact, at the outset, I myself looked for a purely electrodynamic effect and believed that I had obtained it.
A thought which naturally presents itself in connection with high frequency currents, is to make use of their powerful electrodynamic inductive action to produce light effects in a sealed glass globe.
These results constitute a far-reaching development of the modern or electrodynamic theory of the aether, of which the issue can hardly yet be foreseen.
