Zittau and Leipzig: J D Schops 1821. 8vo., pp. iv + -179 +  ads; contemporary paper boards, scuffed and rubbed with worn corners; spine lightly worn; contemporary ink ownership signature to front endpaper; scattered foxing; a good , sound copy. Later edition of this German math textbook. With tables and wood engraved figures in the text. Mathematician and astronomer Christian Pesckeck (1676-1744) taught for many years at the gymnasium in Zittau. J. F. Heynatz (1744-1809) was a German educator, scholar and linguist. He was professor at the University of Frankfurt. WorldCat locates one copy of this printing (National Library of Germany). Several other editions found in Worldcat, all with just a few copies. Good. Hard Cover.