Rudolff, Johann Heinrich - Elementa Amalgamationis, oder Gründlicher Unterricht worinnen die Amalgamatio bestehe - 1723

Rudolff, Johann Heinrich: Elementa Amalgamationis, or Thorough Instruction in which Amalgamation is explained, together with the auxiliary means... Due to its rarity newly issued for printing by F. Roth-Scholzen. Nuremberg, Felßecker 1723. pp. 408-498. Interim cover.
Compare with Ferchl 459 (author, without bibliographic data), not in Poggendorff, Hoover, Koch, etc. - Very rare collection apparently of proven metallurgical recipes. - From the collection volume "Deutsches Theatrum Chymicum".