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While town physician of Joachimsthal (now Jachymov, Czech Republic), he became intensely interested in all aspects of the mining and metallurgy industry by which the town thrived and began a 25-year study of the subject, which culminated in hos posthumously published masterpiece.The 12-chapter treatise included 292 woodcult illustrations carfully executed by Blasius Weffring.In 1438 he entered a contract with three others to develop a refined printing technique and became the inventor of moveable-type mechanical printing in Europe.
The treatise was translated into English in 1912 by future U. president Herbert Hoover and his wife, Lou Henry Hoover. He became a devoted follower of Erasmus, who wrote a foreward to Agricola's first book on mining and metallurgy (1930).Empedocles presented a kind of biological theory of natural selection in an imaginative poem, On Nature.He also played an importqant role in the development of the Western or Sicilian school of Greek medicine.Pythagoras - Greek philosopher and mathematician; held that numbers were basic to matter; the Pythagorean Theorem is named for his geometric formulation; developed atomic theory; students of his philosophy emphasized geometrical form as a basic property of atoms; developed mathematical relationships which led to musical harmony.Empedocles - Some suggest (c.484-c.424) - Greek doctor, poet and philosopher.
In my book I show pictures of a kiva mural I excavated. If you think it not, then please tell me what the lines mean.