Fishermen, G(otthelf) A(ndreas). The calculation of the head applied to physical, militairic, mercantilic and economic objects. It's a lesson manual on how to calculate your head. VIII, 1 Bl., 207 pp. 18 x 10.5 cm. Cardboard tape d. Zt. (slightly toasted and rubbed) with back shield. Dresden, Arnold, 1808. See Enslin, 30 (2nd edition). ==References== Weichold, Schubert, 24f. and 31ff. – First edition. Gotthelf Andreas (also: Gotthellf August or Georg August; Fischer was a mathematics teacher at Kgl. Sächs. Pagen Institute (also known as Kadettenkorps). He later taught at the "Technische Bildungsanstalt" (Technical Education Institute), which was founded in 1828. The important Saxon engineer Johann Andreas Schubert (1808-1870) is one of his most famous students and became his successor. After the introduction, 584 tasks, including solutions, will follow, and various tables will be completed. A second, "good-bye edition" from 1812 has been published unchanged. – Title verso with old Polish library stamp. Good specimen.