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LXIV. An Inquiry into the Possible Existence of Mutual 

 Induction between Masses. By Miles Walker and 

 W. Wit comb Stainer *. 



WE have for long been familiar with the analogy in the 

 behaviour of matter in motion and electricity in 

 motion. The mathematical expressions which state the 

 relations between mechanical force, mass, and velocity are 

 identical with those which express the corresponding electrical 

 relations. 



The object of the experiments described in this paper was 

 to ascertain whether there is any measurable action between 

 masses which would correspond to mutual induction between 

 electric circuits. 



Fig. 1. 



If L is the inductance of the simple electric circuit A e , of 

 negligible resistance (fig. 1), we know that an electric 

 impulse, 



fadt=(hj t dt=.U, 



will start a current, i, flowing in the circuit. If there is no 

 resistance, the current will go on flowing and the circuit will 

 contain a store of energy, |Li 2 . The current can be stopped 

 by applying a back E.M.F. and the circuit made to yield up 



* Communicated by the Authors, being an abstract of a paper read 

 before the British Association at the 1915 meeting. 



