AN ILLUSTRATED HISTORY OF ALCHEMY AND EARLY CHEMISTRY ©2008, 2004, 1978 BY David A. Katz. All rights reserved. Permission for classroom and educational use as long as original copyright is included SPLENDOR SOLIS AN ILLUSTRATED HISTORY OF ALCHEMY AND EARLY CHEMISTRY ©2008, 2004, 1978 BY David A. Katz. All rights reserved. Permission for classroom and educational use as long as original copyright is included. David A. Katz Chemist, educator, science communicator, and consultant. 133 N. Desert Stream Dr., Tucson, AZ 85745, U.S.A. Voice: 520-624-2207 Email:
[email protected] I. Prehistoric Times To tell the story of chemistry, it is best to start in prehistoric times with primitive humans. In his quest for survival, and endowed with a natural curiosity, primitive man learned much about his environment. He was aware of physical properties of substances such as color, shape or form, hardness, taste, weight, density in the form of relative weight, and odor. And he was most probably aware of natural physical changes such as water to ice (and vice versa), lava to rock, certain rocks to dust, etc. It is also safe to assume that primitive man, although he had no knowledge of chemistry, was aware of chemical change in the forms of decaying organic matter, natural production of ozone from lightning (by noting the odor of the ozone), wood burning into charcoal and ash, etc. But primitive man was by no means any sort of scientist and he made no logical or organized study of natural phenomena. The information he gathered about the world was passed from generation to generation by memory, demonstration, or by observation without explanation or any understanding of the true reasons for these phenomena.