'216 Dr. Meyer Wilderman : Connexion between the 



the stored energy is great enough to shatter the bonds 

 between the atoms in the molecules, a new chemical re- 

 arrangement between the atoms takes place — the chemical 

 induction period starts. As the light-energy ^ is further 

 absorbed by the system, the chemical and light-kinetic 

 potentials further increase, the velocity -constant of^ the 

 reaction increases (period of chemical induction), until as 

 mentioned before no more strain is exerted by light on the 

 atoms in the molecules, and the impulses of the sether-waves 

 prevent the atoms and molecules from losing their state of 

 maximum energy, keeping them up in the same state of maxi- 

 mum kinetic energy. It is well possible to conceive that the 

 ratio of the amount of light-energy transformed into chemical 

 energy to the amount transformed into light-kinetic energy 

 mi generis is not always the same, and this may account for 

 the fact that it takes a time before chemical induction starts. 

 But during both periods- — the induction period of energy and 

 the chemical induction period — both the chemical and the 

 light-kinetic potentials must change at the same time, as is 

 to be seen from the fact that with metallic plates an electro- 

 motive force is instantaneously obtained on exposure of one 

 plate to light. 



Besides the period of induction, a period of chemical 

 " deduction " must equally be considered. This, as well as 

 the induction period, is a thermodynamic necessity. When 

 light is removed from the system, and the maximum kinetic 

 energy of the atoms is no longer kept up by the impulses of 

 the aether-waves, the new kinetic energy of the atoms which 

 has been acquired in light will use itself up, i. e., the atoms 

 and the molecules will sooner or later return to their old 

 state which they had in the dark. In what manner will the 

 kinetic energy of the atoms — previously created by light — 

 use itself up in the dark ? If the system consists of inde- 

 pendent components it will evidently transform into heat. 

 This we find with metallic plates mentioned before ; and this 

 period, during which the chemical potential of the plate 

 previously exposed to light gradually assumes its former 

 value, while its light-kinetic potential gradually disappears, 

 may appropriately be called "the deduction period" of energy. 

 If again under the influence of light a reaction was going 

 on in the system which was not going on previously in the 

 dark, then the above-acquired kinetic energy will partly be 

 used up during the reaction as long as it will still continue 

 to go on in the dark, and partly transform into heat. This 

 period of deduction is naturally also a time process, as the 

 process of induction is : it represents to some extent the 



