‎"SCHWANN, THEODOR. - THE DISCOVERY OF PEPSIN, THE FIRST KNOWN ANIMAL ENZYME.‎
‎Ueber das Wesen des Verdauungsprocesses. (On the essence of digestion).‎

‎(Leipzig, Johann Ambrosius Barth, 1836). Without wrappers. In ""Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff"", Band 38, No. 6 (= Zweyte Stück). Titlepage to Vol. 38. Pp. 241-450 a. 3 engraved plates.(Entire issue offered, Heft No. 6, Bd. 38). Schwann's paper: pp. 358-364. Clean and fine.‎

Reference : 43417

‎First appearance of an importent paper in the history of biology, in which Schwann describes his discovery and isolation of pepsin, the substance in the stomach that aids digestion of eggwhite. It is the FIRST KNOWN ANIMAL ENZYME. The paper appeared at the same time in ""Archiv für Anatomie, Physiologie und Wissenschaftliches Medicin""Theodor Schwann (1810-1882) was a great German physiologist, pathologist, and experimenter. One of the founders of the cell doctrine and of the idea of the living nature of yeast. Born at Neuss, near Düsseldorff. A catholic, educated in the Jesuit Gymnasium in Cologne. Intended for the church but took to medicine. He was a pupil of Johannes Müller and a collegueand lifelong friend of J. Henle, the anatomist. In Berlin Schwann was Johannes Müller's assistent for five years, and it was then that he discovered pepsin in 1836 (the paper offered).Parkinson ""Breakthroughs"" 1836 B.The issue contains other importent papers by Seebeck, Matteucci, Marchand, G. Magnus ""Ueber die Wirkung des Ankers auf Elektromagnete und Stahlmagnete"", Schönbein, J. Müller ""Ueber die Structur und die chemischen Eigenschaften der thierischen Bestandtheile der Knorpel und Knochen"" + Nachtrag., Forchhammer ""Der kopaische See und seine unterirdischen Abzugskanäle.."" with a map.‎