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INDEX— Continued
*Notes on the Model 1926 Receiver
(Ernest R. Pfaff) 313
*"Now, I Have Found":
Better Reproduction in Cone Speakers (William C. Morrill) 702
Checking Up On B Battery Leakage (Claude Schuder). . . 210
Coil Design Data (Boris S. Naimark) 488
Coupling Device for the Roberts Circuit, A (Clarence J. Frenck) 208
Cylindrical Coils for the Knockout Set (L. O. Doran) 374
Description of a New NP Coil for the Roberts Receiver (Ralph D. Tygert) 66
Economical Sub-Panel Brackets (R.L.Douglas) 706
Efficient Coil Covering the Broadcasting Frequencies (W. H. Mayfield) 70
File for Ideas, A (F. E. Kunkel) 208
Good Audio Amplifier, A (Edward T. Werden) 490
Good Audio By-Pass Method, A (Jerome Kidder) 600
Good Neutralizing Condenser for the Roberts Circuit, A (H. A. Franchere) 68
Handy Battery Throw-Over Switch (Bernard Salzberg) ... 706
Home-Made Coil Winder for Diamondweave Coils (R. S. Hart) 704
Home-Made Loud Speaker, A (J. T. Carver) 364
How to Make Balloon Coils (John L. Lee) 600
How to Obtain Improved Loud Speaker Reproduction (Boris S. Naimark) 602
How to Provide a Counterpoise System (J. B. Greenman) .... 702
Improving the Volume of the Two-Tube Roberts Circuit (J. W. Teale) 492
Lead-in Problem, A (G. A. Luers) 70
Low Loss Coil, A (Everett Freeland) 602
Measuring High Resistance (Claude Schuder) 66
One Use for a Bypass Condenser (K. B. Humphrey) 604
Ratchet Coil Winder Prevents Unwinding, A (G. A. Luers). 206
Roberts Circuit and Audio Amplifier Without a Storage Battery, The (J B. Clothier, Jr.) 362
Short Waves on the Hanscom Super-Heterodyne (A. T. Hanscom) 68
Simple LongWave Receiver, A (H. H. Buckwalter) 490
Some Notes on Silver's Model 1926 Receiver with Choke Amplification (Davenport Hooker) 702
Storage Battery, The (J. B. Clothier, Jr.) 362
Tracing Radio Noises (A. H. Klingbeil) 206
Using a Voltmeter As a Milliammeter (Claude Schuder) 488
Variometer to Tune Antenna Circuit of the Roberts Set, A (John L. Lee) 210
Winding Spider Web Coils (H. Edward Knies) 492
O
,FFICIAL Indiscretion, An" . . 653
PHOTO-ELECTRIC Cell? Who Invented the 555
*Plans for the Third of the International Radio Broadcast Tests (Arthur H. Lynch) 185
*Portable B Battery Transmitter
Works, How a (Laboratory Staff) ... 678
Praiseworthy Bit of Radio Research, A.. . 431
Prize Contest Announcement 444
Progress of Broadcast Relaying, The .... 24
Progress of Radio in 1925, The 553
Pure Science Becomes Practical 302
*"DADIO Broadcast "Aristocrat,"
IV The (Arthur H. Lynch) 28
Radio Broadcast's Booklet of Call Signals (Lawrence W. Corbett) 337
Radio Broadcast's Booklet of Foreign Broadcasting Stations (Lawrence W.
Corbett) 465
Radio Broadcast's Universal Receiver
(Arthur H. Lynch) 332
Radio Broadcast's Universal Receiver.. 450 Radio Business As Others See It, The. . . 25 *" Radio Central" — Conqueror of Time
and Distance (Fred. J. Turner) 41
Radio Control for Railroads 432
Radio for 1926: A Forecast 24
*Radio Grew Up, How (Robert H. Marriott) 643
*Radio Sets for Light Keepers 666
*Radio: The Jungleman's Newspaper
(John W. Swanson) 427
Recent International Radio Broadcast Tests, The 654
C<HALL We Have a National Radio
O Council? 23
Short Wave Ray Is Discovered, A New. . 433 Short Wave Receiver Contest, The $500 640
Short Wave Stations 9f the World 708
*Short Wave Transmitter, A Universal
(Nicholas Hagemann) 321
*Short Waves — A New Paradise for the
DX Fan (Edgar H. Felix) 182
Short Waves Are Growing Shorter 303
Standards for the Home Laboratory
(Keith Henney) 573
"Straight Line Frequency" Condenser
Means, What the 23
*Super-Heterodyne Construction (Harold C. Websr) 589
*'T>HEY Shut the Door on Fortune -1 (C. S. Thompson) 19
"Tube and Its Best Uses, The (Keith Henney) 658
"TTNIVERSAL RECEIVER, Radio
U Broadcast's (Arthur H. Lynch) 332 "Universal Receiver, Radio Broadcast's 450 *Uniyersal ShortWave Transmitter, A
(Nicholas Hagemann) 321
*Use of the Filament Resistance, The
(John B. Brennan) 682
TSACUUM Tube, The Fascinating
r History of the 300
*Vacuum Tubes, How to Use (Keith Henney) 456
^WAVELENGTH-FREQUENCY
VV Chart 472
'Wavelength-Frequency Conversion
(Homer S. Davis) 471
What Constitutes a Radio Patent? (Leo
T. Parker) 494
*What Do We Know About Short
Waves? (Keith Henney) 54
What Happened at the Fourth National
Radio Conference 431
*What Happened During the 1926 International Tests (Willis K. Wing) . . . 647 *What's New In Radio (Austin C. Les
carboura) 305
What Is the Matter With the Naval Radio
Service? 167
*What Multiple Regeneration Can Do
for Your Tuned R. F. Amplifier (V.
D. Landon) 563
What Our Readers Write Us
110, 244, 394, 518, 618, 716 What the Australians Think of Their
Broadcasting 653
What the "Straight Line Frequency" Condenser Means 23
*When the Doctor Came to the Farallones — by Radio (Lewis N. Waite) ... 63
Who Invented the New Photo-Electric Cell? 555
*Winner of Our $500 Prize Cover Contest, The 100
PORTRAITS
(*Portraits in "The March of Radio")
*Arlin, H. W 24
Arnoldi, Florence Long 33
Branly, Edouard 643
Brees, Anton 445
Cadman, S. Parkes 319
Damrosch, Walter 667
De Forest, Lee 21
Diefendorf, William 669
*Dill, C. C 171
*Dubilier, William 304
Eckersley, E. P. . 434
Elliott, Frank W 177
*Fessenden, Reginald A 656
Golden, Ernie 34
*Hammond, John Hayes, Jr 303
Hansen, Cecilia 667
"Hayes, Cardinal 171
*Hazeltine, L. A 27
*Hogan, John V. L 27
Homer, Louise 178
*Housekeper, William G 25
Kemp, C. S 645
Kent, A. Atwater 178, 556
*Kordi, I. H 303
*Langmuir, Irving 304
Lopez, Vincent
Ludlow, Godfrey 34
McLeod, Keith 34
MacNamee, Graham 319
Marconi, Guglielmo 644
Marriott, Robert H 159
Maude, Cyril 578
Mazarin, Mariette 32
Miura, Tamaki 579
Ryan, Quin A 319
*Saltzman, Charles Me K 557
Sargent, Jean 33
Seidel, Toscha 178
*Shaw, Charles Gray 435
Smith, Fred 669
Stock, Frederick 579
Tesla, Nikola 644
Walsh, Edmund A.. . 447
Werrenrath, Reinald 178
*West, A. G. D 656
Wiley, Louis 181
Zendonini, Elizab3th 22
*Zworykin, V. K 302
AUTHORS
Beers, Roland F 186
Bernard, John 350
Brennan, John B 682
Browning, Glenn H 172
Buckwalter, H. H 490
Clothier, John B. Jr. . . 362