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In 1911, while a house officer at the Boston Floating Hospital, I started using a baby's nipple over a Snofton stethoscope from which the hard rubber bell had been removed, as shown in the accompanying drawing. This combination was found so satisfactory in listening to the chest in thin and emaciated babies that it was used by all the physicians on the boat that summer. The nipple is easily and economically changed as soon as the rubber has lost its tone, or for other reasons.
This simple and inexpensive tip has since been used by many pediatricians in New England. The idea has been passed on from one to another, but to my knowledge it has not been written up or described in the literature.
About six months ago good salesmanship made me change to the Carlsberg stethoscope and I added a nipple to the small bell, as shown in
King GC. A SIMPLE STETHOSCOPE TIP. JAMA. 1931;97(1):24. doi:10.1001/jama.1931.27310010002009b
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