. Bell telephone magazine . Fig. 2. Audiphone Ar-rangement WITH LeatherCarrying Case Having Com-partments FOR Microphone,Amplifier, Battery, andCords. The Lorgnette Han-dle, Bone-conduction Re-ceiver, and Air-conductionReceiver Are Also Shown ,jh»ft^f Fig. 4. The 6A Audi-ometer, WITH AccessoryEquipment. A: 126AAudiometer Index : 12SA Audiometer In-dex Ring. C;100A Audi-ometer Masking Attach-ment. D: Signal : Power Plug. F: 705AReceiver. G: 14A HeadBand. H: 700A Receiver.

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Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1922