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Mercury sphygmomanometers are generally recognized as being more desirable than the spring or diaphragm type. Most of them, however, are too large to be carried in the ordinary bag, and the other instruments are either inaccurate, or easily broken. Owing to the demand for a more portable bloodpressure manometer, I have attempted to devise one which can be easily carried and operated. The one herewith describeddoi:10.1001/jama.1912.04260050119015 fatcat:irptonatu5f5zk6ozxn37rxwri