Aphorismi De Cognoscendis et Curandis Morbis in usum doctrinae domesticae digesti ab Hermanno Boerhaave. Editio Leydensis quarta auctior. Lugdoni Batavorum. Apud Samuelum Luchtmans & Theodorum Haak. Date on title page reads 17284 (with the 8 and the 4 being slightly smudged, see photo). 1733 written in an antiquarian hand in black ink at the bottom corner of the title page. Bound with: Hermanni Boerhaave Libellusde Materia Medica et Remediorum Formulis, quae serviunt aphorismis de cognoscendis et curandis morbis editio altera, emendatissima. Lugduni Batavorum. Apud Isaacum Severinum. Half vellum binding with botanical (grapes) patterned paper over boards. Manuscript title written on spine. Vellum at corners slightly bumped. ¾ inch split at interface of vellum and paper at top of front board. Hinges strong and boards secure. Red page edges. Text in Latin. Very slight asymmetry due to irregular curvatures of vellum spine. A few page corners slightly folded. Personal library stamp of Prof. Dr. Niemeyer on recto of front flyleaf and tiny manuscript notation reading “first edition 1709” on verso of same flyleaf (this would be referring to Garrison Morton 2199). A clean, bright, and tight copy of both titles. Measures approximately 6 ¼ x 4 ¼ x 1 ½ inches. Overall a good copy. Boerhaave, 1668 to 1738, was a successor of Govert Bidloo and teacher of Albrecht von Haller. Hi sname remains immortalized in the diagnosis Boerhaave’s syndrome (esophageal rupture due to vomiting), and his Aphorisms are considered a medical classic. Regarding provenance, we find a Dr Paul Niemeyer of 1832 to 1890, though we cannot confidently attribute the mark in this book to the same.