Trajecti ad Rhenum: Apud A. Van Paddenburg 1778. First Edition. VII, , 258, [2 - corrigenda] pages + 9 engraved tables. 4 1/2 x 7 1/4 inches. 8vo. Drab stiff paper wrappers. Creasing to first few pages. Un-trimmed. Lightly browned throughout, a nice copy. Very Good. Wraps. 
Johann Friedrich Hennert (19 October 1733 – 30 March 1813) was German-born and lectured in mathematics and physics at the University of Utrecht. He was a significant student of Leonhard Euler. He was known for his inclination towards the British school of philosophy. He held the chair of mathematics at the University of Utrecht until 1805. (Wikipedia)
Arranged in a problem / solution format with over 400 problems and solutions recorded. Occasional tables in the text. Houzeau & Lancaster 9264. Houzeau 39. Not found in the Printed Catalogues of the Library of the Royal Astronomical Society (Luther, Martino:2006)
Eight copies in OCLC/Worldcat as of this writing (all in Germany or the Netherlands). The title, roughly translated into English: "Institutions of astronomy, and sciences joined together, and the sundial, chronology, geography, and Thalia, the compass, are accommodated in private schools"