Johann Joachim Becher, German physician and chemist, c 1670s.

Krugner, Johann Gottfried

 
Johann Joachim Becher, German physician and chemist, c 1670s.
4 0 c m
 
32cm
actual image size: 24cm x 32cm

Description

Engraving by Krugner. In 1667, Becher (1635-1682) published a clasification of substances, particularly minerals, in which he expounded a three 'element' theory of matter. Becher's theories were later taken by Georg Stahl (1660-1734) and developed into the phlogiston theory - a theory widely adopted by 18th century chemists, who believed that phlogiston was a substance that existed in all combustible bodies, and was released during combustion.

Image Details

Image Ref.
 
10300423

© Science Museum / Science & Society Picture Library

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