504 



Mr. W. Duddell 



[May 17, 



condenser is not very easy to follow, but it certainly produces the 

 required result, if the conditions are properly adjusted, by causing 

 the discharges in the various circuits to take place in regular sequence. 

 For it is quite easy to show that if the common condenser is not 

 employed, then the circuits tend to all discharge at the same time, 

 so that the addition of extra circuits, instead of filling up the gaps 

 between the discharges, tends to accentuate the discharge, at certain 



Fig. 10. 



I, induction coil ; T, vacuum tube ; V, about 900 volts : 

 R, 5000 to 100,000 ohms ; C, about 5 mf. 



times leaving the intermediate periods idle. By combining a number 

 of circuits and using the high voltage continuous current supplied 

 by the Moutier-Lyons transmission — which was at a voltage of some 

 40,000 volts when I saw the experiments— Mr. Galletti was able to 

 deal with many k.w., the spark frequency being very high, some 

 10,000 per second. Corresponding to each of these sparks there is 

 a series of oscillations, so that in this case the oscillations must be 



