Chemistry and Physics. 251 
cule, which increase to the point of breaking up the molecule 
into its atoms and which action increases with the temperature, 
may produce periodic vibrations in the surrounding light ether. 
i duced i 
the theory that the passage of electricity from molecule to mole- 
cule is to a certain degree selective and that it can call forth cer- 
tain oscillations or vibrations in certain molecules of one su 
stance while it cannot do so in a neighboring substance which 
forms a mixture with the first.— Ann. der Phys. und Chem., No. 
12, 1878, p. 500. i 
9. The Law of the Telephone-—M. Hermann, in Archiv fir 
c 
does not explain the facts observed. Prof. H. F. Weber commu- 
nicated to the Ziricher Naturforschenden Gesellschaft, a paper 
in which he showed that Hermann’s experiments agreed entirely 
