[CAP HORN]. Ministries of the Navy and Public Instruction Scientific mission to Cape Horn. 1882-1883. Volume IV : Geology, by Dr. Hyades. Paris, Gauthier-Villars, 1887. In-4 (265 x 210 mm) of 4 ff.n.ch., 249 pp. 3 maps (2 folding), 30 plates (10 of which are mineralogical). Beige percale, smooth spine, original cover preserved. Nissen, ZBI, 4695. First edition. The part devoted to geology, written by Dr. Paul Daniel Julmes Hyades (1847-1919). The French Mission of Cape Horn occupied an Antarctic station to study the magnetic and meteorological phenomena of the planet. Dr Hyades, an adopted child, was part of the scientific team. It is during the excursions led on the whaler La Romanche that they crossed the Beagle Channel and that the marine pit which today bears the name of the ship was discovered. The first 20 plates (15 of which are in heliogravure) show views, geological formations and the map that accompanies the explorations of M. Lovisato. The next 10 plates, lithographed and hand-colored, illustrate minerals.