Theologe und Mathematiker (1691-1770). Autograph quotation signed. Königsberg. 1 S. Qu.-8vo.
$ 947 / 800 €
"Panta dokimazete, to kalon katechete" ("Test everything. Hold on to the good", Thessalonians 5:21). - Christoph Langhansen was professor of mathematics and theology in Königsberg, several times president of the university and author of numerous mathematical and astronomical writings. - With small ms. numbering.