Second edition of a manual on spherical trigonometry by the Dutch mathematician Pybo Steenstra (d. 1788). It opens with a preface, followed by the main text, divided into five chapters. The first chapter is an introduction to the geometry of spheroids and spherical trigonometry in particular. The second deals with right-angled spherical triangles and the third with differently angled spherical triangles. The fourth and fifth chapter deals with the finding and composition of formulas. Each chapter contains many definitions, demonstrations and propositions for clarification.
With some faint water stains in the gutter and in the upper margin near the end of the book. Paper wrapper frayed, damaged on the spine. Internally otherwise in good condition, wholly untrimmed and with a few of the bolts unopened. Bierens de Haan 4529 note.