Becher, John Joachim

You must not confound David Becker with John Joachim Bec/zer. The work which mentions his portable furnace is Joh. Joach. Becheri, D., Opuscula Chymica rariora,. . . [edited by] Friderico Roth-Scholtzio, Siles. Norimbergae Altorfii,. . . Anno M.DCCXIX. Becher was of the Jewish Nation, a man of the most extraordinary powers. This book is partly in Latin and partly in German. 

You mentioned having picked up Beyer s Opuscula chemica rariora and then come two more words I cannot read, and then you say Rusenstein s Commentary on it . I do not know what you mean his Commentary to be on. I beg to congratulate you upon securing Opusc rariora, but the Author of this is John Joachim Becher. Avery different person is Daniel Becker or Beckher. If it be a commentary on J. J. Becher by Rusenstein, I should very much like to see it, if it be in any language I can read. I did not know of such a work of his. 

The suggestion first made by John Joachim Becher (1635-1682), that combustion is essential to chemical change, was further developed by Georg Ernst Stahl1 (1660-1734). Stahl s theory involved a number of assumptions, which admit of the following summary ... 

Smith, Pamela H. "Alchemy, credit, and the commerce of words and things Johann Joachim Becher at the courts of the Holy Roman Empire, 1635-82." PhD thesis, Johns Hopkins Univ, 1991. 

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