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January 17, 1885

To the Editor of the Journal of the American Medical Association:

JAMA. 1885;IV(3):75. doi:10.1001/jama.1885.02390780019004

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Dear Sir:  —I have just been reading your resumé, in the Jan. 3d number, of an article by Haupt in the "Aerztliches Intelligenzblate," entitled "Perception of Sound in Auscultation." Allow me to ask: Did Haupt present any solid " hearing staff" or an instrument built on the solid plan to substantiate his. conclusion that " the bore of the stethoscope is quite superfluous "?It is important to know if Haupt's conclusions are theoretical merely, in which case they are of doubtful value, or, if obtained by a comparison of instruments, with what imperfect stethoscope his solid instrument was compared.If I mistake not, there is something wrong in the gentleman's premises. Most likely it is in the statement that the aid of the stethoscope "as a hollow resonator is lost, as we use the instrument, for the tube no longer acts as a resonator when we block up both ends of it."

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