Early 18th-century Dutch manuscript on the art of navigation, based on Klaas de Vries, Schat-kamer ofte konst der stuurlieden ... (1702). De Vries taught mathematics in Amsterdam, his work proved very popular and appeared in numerous editions between 1702 and 1818. The author of the present manuscript unknown, but was most likely a student of mathematics, possibly even a student of De Vries himself at the beginning of the 18th century.
The manuscript deals with several subjects regarding navigation, including many different calculations for calendars (for example the golden number), the tides and determining the time at night. Furthermore, theories and examples of correcting compass declination and determining the time of sunrise and sunset from the declination of the sun in combination with the pole star, map reading and course calculation. It ends with approximately 50 sample problems in trigonometry and geometry, showing the (student) author's mathematical work.
Binding soiled, edges frayed, lacking the first 7 leaves, quires 3 and 5 detached. With several ink stains, the ink has bled through some leaves. Otherwise in good condition. An interesting manuscript on navigation, probably from a Dutch student ca. 1702/13. For De Vries's work: The Crone library 374 (1st ed 1702).