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John Glenn's physiological data (reading from 4 minutes after lift-off for the MA-6 mission).  Source: NASA, "Results of the First Manned Orbital Space Flight," February 20, 1962.  Overwriting the data is pieces of a score from Georg Wilhelm Roehner's 1850 "A practical treatise on musical composition."

John Glenn’s physiological data from MA-6 mission (reading taken 4 minutes after lift-off). Source: NASA, “Results of the First Manned Orbital Space Flight,” February 20, 1962. Overwriting the data is pieces of a score from Georg Wilhelm Roehner’s 1850 “A practical treatise on musical composition.”