Joachim Jungius

Beginning in 1609, he was a professor of mathematics at the University of Giessen, and in 1614–15, with Wolfgang Ratke (1571–1635) and Christoph Helvig (1581–1617), he took part in studies of educational reform.

In 1622 at Rostock, he founded an early scientific society known as Societas Ereunetica sive Zetetica.

Jungius believed that science was based on mathematics, and in Hamburg stressed the importance of critical thinking to his students.

Jungius was an important figure of 17th century atomism, and was an advocate of a "corpuscular chemistry" that assumed the conservation of mass.

In 1638 he published the textbook Logica Hamburgensis, which presented late medieval theories and techniques of logic.