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Stephen Hales, English clergyman and physiologist (born 1677)
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Stephen Hales
English clergyman and scientist (1677–1761)
Stephen Hales was an English clergyman who made major contributions to a range of scientific fields including botany, pneumatic chemistry and physiology. He was the first person to measure blood pressure. He also invented several devices, including a ventilator, a pneumatic…Source: Wikipedia (CC BY-SA)
January 4
Day of the year
January 4 is the fourth day of the year in the Gregorian calendar; 361 days remain until the end of the year.Source: Wikipedia (CC BY-SA)