Stephen Hales, FRS, DD (17 September 1677 – 4 January 1761) was an English clergyman who made major contributions to a range of scientific fields including botany, pneumatic chemistry and physiology. He invented several devices, including a ventilator, a pneumatic trough and a surgical forceps for the removal of bladder stones. He was also a philanthropist and wrote a popular tract on alcoholic intemperance.
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... is due to an English parson, the Reverend Stephen Hales ... Besides this, Stephen Hales was also the first, in 1727, to determine arterial blood pressure, when he measured the rise in a column of blood in a glass tube bound into an ... The American Society of Plant Biologists awards the Stephen Hales Prize annually to a scientist for work in plant biology ...