SAINTE MARIE MAGDELEINE, Dom Pierre de. Traitté d'Horlogiographie, contenant plusieurs manières de construire sur toutes surfaces, toutes sortes de lignes horaires : & autres cercles de la Sphere. Avec quelques Instrumens pour la mesme pratique, & pour cognoistre les heures durant la nuict : & l'heure du flus & reflus de la Mer. Plus la methode de couper en pierre ou en bois les corps reguliers par le cube & par le cylindre. 1641.

First edition of this of this famous work of horology, astronomy and navigation.
The author presents the different kinds of dials, how to trace them and construct them on flat surfaces, or "on the convexity of a globe."
Chapters deal with Babylonian, Italian and Jewish clocks and dials, signs of the zodiac, celestial houses, golden numbers, the age of the moon, the ebb and flow of the sea, etc.

This book has been very successful and has often been reissued, but this first edition is very rare.