1622 in science

• The slide rule is invented by William Oughtred (1574–1660), an English mathematician, and later becomes the calculating tool of choice until the electronic calculator takes over in the early 1970s. ==Physiology and medicine==

• Gaspare Aselli discovers the lacteal vessels of the lymphatic system. • Flemish anatomist Giulio Casserio publishes Nova anatomia in Frankfurt, containing clear copperplate engravings of the human anatomy. ==Technology==

• February 22 – An English patent is granted for Dud Dudley's process for smelting iron ore with coke. ==Births==

• January 28 – Adrien Auzout, French astronomer (died 1691) • March 10 – Johann Rahn, Swiss mathematician (died 1676) • April 5 – Vincenzo Viviani, Italian mathematician and scientist (died 1703) • undated – Jean Pecquet, French anatomist (died 1674) ==Deaths==

• January 23 – William Baffin, English explorer and navigator (born 1584) • February 19 – Sir Henry Savile, English polymath and benefactor (born 1549) • April 13 – Katharina Kepler, German healer and mother of Johannes Kepler (born 1546) • May 15 – Petrus Plancius, Flemish cartographer and cosmographer (born 1552) ==References==