Criterion for the Oscillatory Discharge of a Condenser. 143 



while Q 2 = L 2 and Qi = L x are in the ratio of x 2 ' *k« 



Then on the scale used Q L would give a numerical 

 value for — = , and Q 2 for — J=^, from either of which / 



\/\Kt *J\Kt 



might be found. 



IX. On the Criterion for the Oscillatory Discharge of a Con- 

 denser. By E. H. Barton, D.Sc, F.R.S.E.,' and W. B. 

 Morton, M.A* 



THE ordinary condition for the oscillatory discharge of a 

 condenser of capacity C through a wire of resistance R 

 and inductance L, namely 



< R 2 ' 



is obtained from the differential equation 



0= C +U ^t +L W 



(1) 



by making Q proportional to e xt and expressing the condition 

 * Communicated by the Physical Society : read March 24, 1899. 



