(Born: Altstrelitz, Germany, 2 May 1768; Died: Rostock, Germany, 17 June 1833) German naturalist.

Siemssen studied theology and natural sciences in Bützow and Göttingen. He became a private docent at the university and an instructor at the large city school in Rostock. He was especially interested in the botany and animals of his native land.

Biographical references: ADB. • DBA: I 1184, 234-237; II 1224, 419-420. • Hamberger & Meusel, Gelehrte Teutschland, 1796-1834. • Hirsch, Biographisches Lexikon, 1884-8. • Neuer Nekrolog der Deutschen. • Poggendorff: 2, col. 927. • WBI.

1. German, 1791-5 [Periodical].
Magazin für die Naturkunde und Oekonomie Meklenburgs. Herausgegeben von A.C. Siemssen. Schwerin und Leipzig, 1791-95.

2 vols.

Very scarce. Siemssen edited this short lived journal that dealt with the natural science and economics of the region of Mecklenburg in eastern Germany.

Bibliographical references: BL [967.e.7.]. • LKG: XIV 149.

2. German, 1792.
Vorläufige Nachricht von den Mineralien Mecklenburgs, systematisch entworfen. Schwerin, Gedrukt und Verlegt von Wilhelm Bärensprung, 1792.

8°: 56, [6] p.

Rare. An early topographical mineralogy in which the minerals of the area of Mecklenburg in eastern Germany are systematically treated.

Bibliographical references: BL [973.b.10.(4.)]. • LKG: XIV 150a.

3. German, 1804.
Systematische Uebersicht der mineralogisch einfachen Mecklenburgischen Fossilien (Neuer Beitrag zur lithographischen Kenntniss der Sudbaltischen Länder, mit besonderer Rücksicht auf Mecklenburg) von Adolf Christian Siemssen. Rostock und Leipzig, 1804.

12°: 64 p.

Rare. Co-authored with Ludwig Peter Friedrich Ditmar [1784-1872]. This is a topographical study of the fossils and a few minerals found in the region of Mecklenburg in eastern Germany.

Bibliographical references: BL [T.874.(5.)].

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