SYNTHEMATOGRAPHIK - BERGSTRÄSSER, JOH. ANDR. BENIGN.

Ueber sein am ein und zwanzigsten Decembr. 1784. angekündigtes Problem einer Korrespondentz in ab=und unabsehbaren Weiten der Kriegsvorfälle oder über Synthematographik mit Kupfern in Schreiben an ...den Prinzen Ferdinand Herzogen zu Braunschweig und Lüneburg. Erste-Zwote-Dritte Sendung. (of 5 issued). 3 Bde.

Hanau, (no printer), 1785-86. Bound in one fine cont. hcalf, raised bands and richly gilt back. A stamp on first titlepage and an old owner name. (1),134;(1),118;(4),144 pp. and 10 folded engraved plates. On good paper, clean and fine.

First edition. Bergsträsser invented this form of signalling, which he called "Synthematographik", an optic telegraphy based on a binary code. The system is well illustrated in the 10 plates. - Rosenthal p. 372. - Poggendorff I: p. 152.

Order-nr.: 32295