Johann Rudolph Glauber (1604 - 1670) was a prominent Dutch-German alchemist and chemist, who has also been called one of the first chemical engineers. Christopher Packe translated the bulk of Glauber's works on Alchemy from High-Dutch into English. His translation was published in London in 1689. Hans Nintzel recognized the importance of this work and included it in the R.A.M.S. Library. "The Five Centuries" is but a small part of Glauber's works. The rest of Glauber's Alchemical works are also available in The R.A.M.S. Library of Alchemy. This text was typed by Hans Nintzel and D. H., a frequent contributor to the R.A.M.S. effort. I scanned the typed pages and, using optical character recognition (OCR) software, converted them into digital text. In spite of extensive editing, a few OCR errors might still be found in the text.