On Electro-magnetic Action of an Electrified Sphere. 253 

 My assumption is that the complete components are — 



and it is easy to see that they can be put into the form, 



H= {^(E'-o'i)^.!. 



6 dxdz sx 



and these satisfy the condition — 



dx dy dz 

 These may be further simplified by assuming a function — 

 ^=-m(x + w^±\l 



R dx 



G= ^ 



dy 



H= ^ 



dz 



We hence easily see that in the general case where the sphere 

 is moving with component velocities _p q r, we must take — 



X= - ^« I ^ . 53, + ,-. + a^ (pI + 5| + r|)^ 



or calling — 



d d d d 

 p — + q — + r — = — 



dss dy dz dd 



and observing that — 



X y z T> 

 ^B/ ^R R 



we have — 



^ 2 V dd R/ 



