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THOROPHONE LOUD SPEAKER
The new Thorophone is built on the solenoid principle, with a constant air gap which prevents varying impedance in the receiving set when the speaker Is being used. It has a power amplifying unit, and the horn is of thorite. This composition is cellular and it will not resonate with any sound wave. It is a very good speaker. Made by W inkier _
M C°" Kl^H^RuB NA-ALD SUPER DE LUXE DIAL
Chicago^n" «BJ Like the other Na-ald dials, the Super De
Price $45 oo Luxe is manufactured from black bakelite.
It is made in the 3!" size with the graduations clearly marked in white. Made by Alden Mfg. Co., Springfield, Mass.
THE CHASLYN BALL BATTERY
TESTING SET
Consisting of a Ball Battery Tester, a Battery Depth Gauge, and a Battery Water Filler. A complete and efficient equipment for learning the condition of your storage battery. Made by the Chaslyn Co., 3845 Ravenswood Ave., Chicago, 111. Price $1.00
TUFGLAS BATTERY TRAY A practical and satisfactory means of insuringyour rugs and carpets against damage from the acid electrolyte. Made by Russell B. Cressman, 200 Fifth Ave., New York. Price $1.50
OPERADIO RECEIVER
In this carrying case the manufacturers combine a six-tube receiver, batteries, loud speaker and loop antenna very effectively. The loop is built inside the top of the case, which is shown open in this cut. Made by Operadio Corp., Chicagr, III. Price complete $190
BRUNO ULTRA VARIO CONDENSER A well designed condenser in both electrical and mechanical details. Its construction makes its use possible as two separate .00025 mfd. condensers, or in series to produce a capacity of .000125 mfd. Its regular maximum capacity is .0005 mfd. Made by Bruno Radio Corp., 300 Water St., New York City
SUPERSPEAKER
A loud speaker which has earned its right to rank with the best speakers now obtainable. The base unit has an adjustment which allows setting for the most suitable volume. Made by the Jewett Radio & Phonograph Co., 5680 i2th St., Detroit, Mich. Price $29.85