ANNALS OF THE NEW YORK ACADEMY OF SCIENCES 

 Vol. XXVII, pp. 215-243 



Editor, EALrii W. Tower 



OPERATING FEATURES OF THE AUDION 



BY 



E. H. AraiSTRONG 



A^ 



^y^^Oniaii„/i§f/|^-^.^ 



14 SEP i 3 1917 <i) 



\ >^.. 



t^^'onsLl m^^t 



<^\ 



NEW YOEK 

 PUBLISHED BY THE ACADEMY 



3 August, 1917 



