| I.  Ancient Knowledge and Thought (up to 1500) eventually leading to chemistry
 A. Ancient Practical Arts
 B. Ancient Speculations
 C. Earliest ideas of elements
 D. Alchemy and Practical Arts:
 (early)
 (medieval (8th - 13th Century))
 (late  (14th - 17th Century))
 
 II.  Precursors to Modern Chemistry
 (1500-1800)
 A. Iatrochemistry, Pneumatic Chemistry.
 B. Understandings of Combustion and Calcination
 including phlogiston and its downfall.
 C. Contemporary People and
 Developments in Technology
 D. Elements (discovered between 1500 and 1800).
 E.  Earliest Modern Chemistry (1750-1800):
 Cavendish,  Scheele, Lavoisier,  Priestley, et al.
 | III.  Beyond 1800: A. General, Analytical and Physical Chemistry
 Dalton's Atomic Theory, electrolysis of salts (and water),
 Berzelius' Dualistic Theory, Radical Theory,
 Oxygen Theory of acids,
 Early Thermochemistry (1800-1850),
 Discovery of Elements and
 Development of Technology (1800-1950)
 (1850-1900) Valence, atomic weights, the Periodic Law,
 electrolytes, and radiation.
 (1900-1960) Einstein, isotopes, nuclear atom,
 ion exchange, etc.
 
 B.  Organic Chemistry and Biochemistry
 (1800-1850) Wöhler, beginnings of Organic and
 Biochemistry; early ideas of fats;
 Radical Theory, Type Theory.
 (1850-1900) Molecular structure, synthetic dyes,
 (1900-1950) Organic synthesis (aided by spectroscopy),
 hormones, polymers, antibiotics, vitamins,
 biochemistry, enzymes, and proteins.
 
 |