9 ELECTRONIC MONITORING, MEASURING AND RECORDING APPARATUS FOR BLOOD PRESSURE, BLOOD ANALYSIS, HEART RATE, ANALYSIS OF CARDIAC OUTPUT, MEASUREMENT OF PARTIAL PRESSURE OF OXYGEN IN THE BLOOD, RESPIRATION, TEMPERATURE, INTRACRANIAL PRESSURE, PH MONITORS, GAMMA COUNTERS, AND APPARATUS FOR AUTOMATICALLY DETERMINING BLOOD GROUPS AND FOR DETECTING THE PRESENCE OR ABSENCE OF AGGLUTINATION THEREIN