Verhandeling van de sphaerische of klootsche Zonne-Wysers;

Namelyk, hoe men op een Sphaera Convexa, of Ronde Kloot, allerley Zonnewysers meetkonstig beschryven kan, als mede om in een Sphaera Concava of Halve Holle Kloot veelerley uur- en andere cirkels te beschryven (...). Johann Hermann Knoop. Leeuwarden. H.A. de Chalmot. 1761.

8vo. Half leather, title on spine in green and gilt stamping, marbled endpapers, title in red and black and vignette by J.C. Philips, (8),244,(7),(1) pp., complete with 21 plates, all copperplates. Title with sev. signatures, all in ms., name previous owner on p. (1). First edition. Scarce. J. H. Knoop is mostly known for his standard work on Pomology. He was director of the Marienburg garden near Leeuwarden and, after his dismissal for excessive drinking, wrote several books on plant systematics, horticulture, astronomy, mathematics and history.