In the royal city of Most, Matyáš Hanza publishes the book "Treatise on Teplice mineral spa waters" with an appendix on the use of Bílinská kyselka (page 348), Zaječické bitter water (362) and magnesium powder from bitter water (Hoffmann's Sedlitz bitter wasser) in Teplice spa treatments.
https://books.google.cz/books
Abhandlung vom Teplitzer mineralischen Badewasser