Table 279. 



CONTACT DIFFERENCE OF POTENTIAL IN VOLTS. 



SoUds with SoUda In Air.* 

 Temperature of substances during the experiment about i8° C. 



• Everett's " Units and Physical Constants." The table is from Ayrton and Perry's experiments, and was pre- 

 pared by Ayrton. 



Smithsonian Tables. 



268 



