1673 in science

The year 1673 in science and technology involved some significant events.

Mathematics

 * John Kersey begins publication of The Elements of that Mathematical Art Commonly Called Algebra.
 * Gottfried Wilhelm Leibniz rediscovers the arctangent series and obtains the Leibniz formula for $π$ as the special case.
 * Samuel Morland publishes A Perpetual Almanack and Several Useful Tables.

Microbiology

 * Antonie van Leeuwenhoek's observations with the microscope are first published in Philosophical Transactions of the Royal Society.

Physics

 * Christiaan Huygens publishes his mathematical analysis of the pendulum, Horologium Oscillatorium sive de motu pendulorum.

Births

 * August 10 – Johann Konrad Dippel, German theologian, alchemist and physician (died 1734)
 * August 11 – Richard Mead, English physician (died 1754)

Deaths

 * May 6 – Werner Rolfinck, German scientist (born 1599)
 * August 17 – Regnier de Graaf, Dutch physician and anatomist who discovered the ovarian follicles (born 1641)
 * December 15 – Margaret Cavendish, Duchess of Newcastle-upon-Tyne, English natural philosopher (born 1623)