698 Mr. G. A. Newgass on a Physical Interpretation of 



the stream through a definite range of temperature. The 

 dependence of the limiting velocity upon the disposition o£ 

 the thermometers with regard to the heating element i& 

 shown by means of calibration curves obtained for various 

 distances between the respective thermometers and heating 

 element. 



The author desires to express to Dr. Charles Carpenter, 

 C.B.E., his thanks for the provision of the facilities neces- 

 sary for carrying out the work detailed in this paper. 



709 Old Kent Road, S.E. 

 Dec. 29, 1921. 



LXXXIV. On a Possible Physical Interpretation of Lewis 

 and Adams'' Relationship between h, c, and e. By Gerald 



A. NEWGASS, B.A. {Cantab.)*. 



CONSIDER, the hypothetical case of two spheres- 

 carrying equal but opposite charges £, of no mass 

 other than electromagnetic, of equal radii. Imagine that the 

 two spheres are touching, but that they are prevented from 

 discharging. It' the system is set rotating about its centre 

 of mass and an axis at right angles to the line joining the 

 centres of the spheres, there will be a certain angular 

 velo ity, angular momentum, and rotational energy at 

 which the centripetal force would balance the electrostatic 

 attraction. These values were roughly calculated, making- 

 use of the simplifying assumptions that the electromagnetic 

 masses as given by the equation m = e 2 / (6irrc 2 ) were con- 

 centrated at the centres of the spheres, and that any 

 possible effects of relativity etc. due to the high velocities 

 cancelled out, and it was found that while the angular 

 velocity and the rotational energy of the system varied 

 with the radii of the spheres, the angular momentum was 

 independent of the size of the system and was given by 



1 e 2 



2 V6V c ' 



If the electricity is assumed to be distributed uniformly 

 throughout the spheres instead of on the surface, or if, 

 instead of both spheres being equal, one is considerably 

 larger than the other, the only effect is to alter the 

 coefficient. Accordingly, it is suggested that if the values 

 of the moment of inertia and angular momentum were 



* Communicated by the Author. 





