Alchimists 17th century
Tycho Brahe, born Tyge Ottesen Brahe, more commonly called Tycho, was a prominent Danish astronomer, astrologer, and alchemist of the Renaissance.
As a young man he traveled extensively throughout Europe, studying in Wittenberg, Rostock, Basel, and Augsburg and acquiring mathematical and astronomical instruments. In 1572 Tycho unexpectedly even for himself discovered a new star in Cassiopeia, and the publication of this turned the young Dane into an astronomer of European reputation. For further astronomical research he established an observatory and gathered around him modern progressive scientists.
Besides practicing astronomy, Tycho was an artist, scientist, and craftsman, and everything he undertook or surrounded himself with had to be innovative and beautiful. He even founded a printing house to produce and bind his manuscripts in his own way, and he perfected sanitary ware for convenience. His development of astronomical instruments and his work in measuring and fixing the positions of the stars laid a solid foundation for future discoveries.
Tycho's observations - the most accurate possible before the invention of the telescope - included a comprehensive study of the solar system and the precise positions of more than 777 fixed stars. What Tycho accomplished using only his simple instruments and intellect remains a remarkable achievement of the Renaissance.
Johann Sigismund Elsholtz (also Elßholtz, Elßholz, Elsholz, Latin Elsholtius) was a German physician, botanist and chemist, a pioneer of hygiene.
Elsholtz studied at the universities of Wittenberg, Königsberg, and Padua, where he received his doctorate. In 1654, he published Anthropometry, written for artists and astrologers as well as students of medicine and physiognomy. The book also explored the supposed relationship between the proportions of the human body and morbidity. Elsholtz was a very versatile scientist and worked in the fields of horticulture, botany, alchemy, astrology, dietetics and medicine, among others.
Elsholtz was later appointed court botanist, alchemist and physician to Elector Friedrich Wilhelm of Brandenburg (1620-1688), and in 1657 was placed in charge of his botanical gardens in Berlin, Potsdam and Oranienburg. In 1672 his treatise Vom Garten-Baw: Oder Unterricht von der Gärtnerey auff das Clima der Chur-Marck Brandenburg was published in Berlin. ("From the Garden Bow or Lessons in Gardening in the Climate of Chur-Marck Brandenburg." It presents the latest gardening techniques for the German climate, discussing flower gardens and their design, vegetable gardens, medicinal gardens, and vineyard care and design.
Elsholtz was a German pioneer in the field of cleanliness and nutrition. Generally speaking, the term "hygiene" first appeared in German in 1682 in his Dietetikon. It is the term he uses to describe the principle of maintaining good health. In his book, the doctor makes recommendations for healthy eating and drinking. He calls for clean water and good air and emphasizes the importance of personal hygiene. Elsholtz was one of the first to administer intravenous injections to people around 1665.
Johannes Faulhaber was a German mathematician and fortification engineer.
He was a weaver, but studied mathematics and showed such aptitude that the city authorities appointed him the city mathematician and surveyor, a surveyor. In 1600, Faulhaber opened his own school in Ulm, and worked on the fortification of Basel, Frankfurt, and many other cities. He also designed water wheels in Ulm and made mathematical and geodetic instruments, particularly for military purposes.
Among the scientists with whom Faulhaber collaborated were Kepler and van Ceulen. He made the first German publication of Briggs' logarithms, and also made the first illustrated descriptions of Galileo's compass.
