Claude Siméon Passemant - Richtige Anweisung reflectirende Telescopia nach Gregorianischer und Newtonischer Art - 1747

This rare first German edition of Claude Siméon Passemant's 'Richtige Anweisung, reflekterende Telescopia' (1747) provides detailed instructions on creating reflecting telescopes. Passemant, a renowned optician for King Louis XV, experimented with glass-melting techniques to improve his achromatic telescopes. He was one of the first producers of Dutch telescopes, which are achromatic with a relatively low magnification but wider field of view. This book includes two folded copper plates demonstrating telescope construction and components. The book is in good condition considering its age, with some signs of light rust or browning and slight damage to the book block. It has a modern, though period-style paper spine and a slightly cracked spine. The full title is 'Richtige Anweisung, reflekterende Telescopia. Nach der Gregorianischen und Newtonischen Kunst mancherley Grösse und Einrichtung, zusammen mit Spiegeln und Brillent, dem schönen Perspectiv, Röhren, und Microscopis mit Mahlern... (translated from the French, and added information from Johann Christian Hertel)'.