Phillippus Aureolus Paracelsus (Theophrastus Bombast von Hohemheim) - Swiss physician; controversial figure in medicine and alchemy; promoted the production of chemical medicines for illnesses of the human body; saw the human body as a chemical system monitored by spiritual alchemists; developed many medical remedies; developed theoretical chemistry through sets of metal experiments which produced salt solutions; added salt to mercury and sulphur as components of metals.
Georg Bauer - "Agricola" - German educator, city official, and physician Georgius Agricola (Latinized for of George Bauer) is best known as the author of De re metallica (1556), a treatise on mining and metallurgy.
The 12-chapter treatise included 292 woodcult illustrations carfully executed by Blasius Weffring.
Aristotle - updated engraving; Greek philosopher, educator and scientist; undertook a large-scale classification of plants and animals; introduced a method of scientific thinking that still plays a role today.
The Reformation, the Renaissance, and the scientific period of the 17th century can hardly be contemplated without printed books.
Nicholas Copernicus - Polish astronomer; regarded the founder of modern astronomy. He studied mathematics and optics at Cracow, then canon law at Bologna, before becoming canon of Frombork.
Empedocles - Some suggest (c.484-c.424) - Greek doctor, poet and philosopher.
To account for real change, he assumed that there must be more than one kind of matter, and he postulated four roots as elements; earth, air, fire, and water.