CONTENTS of N° 239.— Fifth Series. 



XXXII. On the Passage of an Oscillator Wave-train through 

 a Plate of Conducting Dielectric. By George Udny Yule, 

 Demonstrator in Applied Mathematics, University College, 

 London page 309 



XXXIII. On the Objective Eeality of Combination Tones. By 



A. W. BECKER, M.A., F.R.S., and E. Edser, A.B.O.S 341 



XXXIY. Energy Movements in the Medium separating Elec- 

 trified or Gravitating Particles. By H. N. Allen, University of 

 Nebraska, Lincoln, Neb 357 



XXXV. On a Simple Form of Harmonic Analyser. By 

 George Udny Yule, Demonstrator in Applied Mathematics, 

 University College, London 367 



XXXVI. The Clark Cell when producing a Current. By 



S. Skinner, M.A 375 



XXXVII. On some Experiments with Alternating Currents. 

 By A. Sadowsky, University Professor in Turiew (Dorpat), 

 Eussia 377 



XXXVIII. Notices respecting New Books : — Dr. Geikie's 



' The Great Ice Age and its Eelation to the Antiquity of Man* . . 379 



XXXIX. Intelligence and Miscellaneous Articles : — 



Silvering Glass in the Cold, by MM. Auguste and Louis 

 Lumiere 387 



On the Glow-Discharge, by A. Herz ib. 



Prize-question proposed by the Schnyder von "Wartensee's 

 Foundation for Arts and Sciences, Zurich 388 



*** It is requested that all Communications for this Work may be addressed, 

 post-paid, to the Care of Messrs. Taylor and Francis ^Printing Office, Red 

 Lion Court, Fleet Street, London. 



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