Late-20th-century specialist drawing pens by Haff all with plain ebonite handles. the blades made of stainless steel with hardened tips. (Right to left) : Broad pen with numbered settings on a thumb-screw from 0.25- I.20 mm thick: a curve line pen for lines 0.1-0.35 mm thick: a twin road or rail pen: a small fine-line pen for lines 0.2- 0.8 mm thick
“began work on Traité complet de l’anatomie de l’homme comprenant la médecine operatoire, a masterpiece on human anatomy that was published in eight volumes.
Bourgery worked on the atlas until his death in 1849, with the last volume being published posthumously. The finished work contained 2108 pages of folio-sized text and 726 hand-colored lithographs. The illustrative work was performed by Nicolas-Henri Jacob (1782–1871), who was a student of famed painter Jacques-Louis David (1748–1825).
"The first five volumes of Traité complet de l’anatomie de l’homme dealt with descriptive anatomy; volumes six and seven covered surgical anatomy; and the last volume discussed general and philosophical anatomy. It is considered to be one of the most comprehensive and beautifully illustrated anatomical works ever published.”
"The frontispiece of an Adelard of Bath Latin translation of Euclid’s Elements, c. 1309–1316; the oldest surviving Latin translation of the Elements is a 12th-century translation by Adelard from an Arabic version.”