. Electricity in diseases of the eye, ear, nose and throat . sten for some time eachday to the same piece of music played by the phono-graph, selecting something with which he was form- AUDOPHONE. 435 erly familiar and giving close attention to the first, only sufficient will be heard to recognizethe meter, then fragments of the notes, and ulti-mately, more or less of the music will be heard. Ihope some day that I or some one more able, willdevise an apparatus that will automatically trans-pose music or spoken words into a higher or a lowerkey, for it is the voice register that is usu
. Electricity in diseases of the eye, ear, nose and throat . sten for some time eachday to the same piece of music played by the phono-graph, selecting something with which he was form- AUDOPHONE. 435 erly familiar and giving close attention to the first, only sufficient will be heard to recognizethe meter, then fragments of the notes, and ulti-mately, more or less of the music will be heard. Ihope some day that I or some one more able, willdevise an apparatus that will automatically trans-pose music or spoken words into a higher or a lowerkey, for it is the voice register that is usually lostand there are still tone islands remaining for soundsabove or below those of the normal eight octavesbut the difficulties at present seem almost insur-mountable. An Aid In Deafness.—The Chief of the Swe-dish Government Telephone Bureau has made aminiature telephone, with an end piece suitable forinsertion into the ear. Its size is four by six such telephones placed in the ears and finewires resting behind the ears could connect with a. Fig. 121.—Stolz Electrophone. 436 ELECTRICITY IN DISEASES OF THE EAR. battery and coil in the breast pocket. A microphonereceiver in connection could be held in the hand. Thiswould make a very efficient ear trumpet. Deaf peo-ple often hear well by telephone. Fig. 121 shows transmitter connected directlywith the battery. CHAPTER 11. THE MASTOID. —Dr. Albert H. Andrews, ofChicago, from a wide experience writes: Examina-tion of the mastoid by transillumination is based up-on the fact that the healthy, normal mastoid willtransmit light, while a mastoid filled with pus orgranulation tissue obstructs the passage of of the older authors claim the method is un-reliable. The fault was in the lamp used. The test is made by means of a small cylindricaltwelve candle power incandescent lamp, covered witha soft rubber hood, having a 5/i^-inch aperture atthe end for contact with the mastoid. The examina-ti
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1912
