Johann Friedrich Meyer (24 October 1705 – 2 November 1765) was a Thuringian chemist and pharmacist who ardently supported the phlogiston theory even after the work of Joseph Black was published.
He wished to study theology but was forced to work at the Hirsch pharmacy in Bramsche belonging to his maternal family.
He worked for a while in the pharmacy of the Francke Foundations at Halle and return to his family business in Osnabrück, inheriting its ownership in 1737.
[1] In 1764, Meyer published a book on his researchers Chymische Versuche zur näheren Erkenntnis des ungelöschten Kalchs in which he claimed that alkaline substances had an element derived from fire called acidum pinque produced by the reaction of acids with fire.
Meyer's ideas found support with Johann Christian Wiegleb, Karl Wilhelm Pörner, and Antoine Baumé.