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Recently some sixty drug stores in the city of Chicago have added to their equipment a device called the Cardi-O-Meter, which enables any person who will put his arm in a strap and deposit ten cents in the slot to get a record of his blood pressure and of his pulse rate. This is not the first time that various schemes have been developed for measuring the blood pressure by nonmedical agents who collect a dime. The plan burst forth not long ago on Coney Island in New York and on the Boardwalk in Atlantic City. It was in effect in St. Petersburg, Fla., where many a middle aged westerner goes to keep warm in the winter. However, now the recording of blood pressure, it seems, is going to be wholly mechanical.
Americans are great believers in gadgets. The time may yet come when some ingenious mechanic, working in a
CARDI-O-METER. JAMA. 1941;117(20):1709–1710. doi:10.1001/jama.1941.02820460047013
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