1912] on High Frequency Currents. 513 



The position is therefore a very interestiug one. No one of the 

 methods seems at the moment to liave so many advantafjes as to 

 make it the one method above all others for producing high fref[nency 

 currents. The final decision as to which is the best will probably 

 in the end be determined by the regularity with which the apparatus 

 works, and by that governing factor in all commercial enterprises — 

 the cost of production. 



[W. D.] 



