Many other star-groupings have been proposed from time to time; in some cases a separate name has been given to a part of an authoritatively accepted constellation, e.g. Ensis Orionis, the sword of Orion, or an ancient constellation may be subdivided, e.g. Argo (ship) into Argo, Malus (mast), Vela (sails), Puppis (stern), Carina (keel); and whereas some of the rearrangements, which have been mostly confined to the southern hemisphere, have been accepted, many, reflecting nothing but idiosyncrasies of the proposers, have deservedly dropped into oblivion. Nicolas Louis de Lacaille, who made extended observations of the southern stars in 1751 and in the following years, and whose results were embodied in his posthumous _Coelum australe stelliferum_ (1763), introduced the following new constellations:--Apparatus sculptoris (Sculptor's workshop), Fornax chemica (Chemical furnace), Horologium (Clock), Reticulus rhomboidalis (Rhomboidal net), Caela sculptoris (Sculptor's chisels), Equuleus pictoris (Painter's easel), Pyxis nautica (Mariner's compass), Antlia pneumatica (Air pump), Octans (Octant), Circinus (Compasses), Norma _alias_ Quadra Euclidis (Square), Telescopium (Telescope), Microscopium (Microscope) and Mons Mensae (Table Mountain). Pierre Charles Lemonnier in 1776 introduced Tarandus (Reindeer), and Solitarius; J. J. L. de Lalande introduced Le Messier (after the astronomer Charles Messier) (1776), Quadrans muralis (Mural quadrant) (1795), Globus aerostaticus (Air balloon) (1798), and Felis (the Cat) (1799). Martin Poczobut introduced in 1777 Taurus Poniatovskii; Bode introduced the Honores Frederici (Honours of Frederick) (1786), Telescopium Herschelii (Telescope of Herschel) (1787), Machina electrica (Electrical machine) (1790), Officina typographica (Printing press) (1799), and Lochium funis (Log line); and M. Hell formed the Psalterium Georgianum (George's lute). The following list gives the names of the constellations now usually employed: they are divided into three groups:--north of the zodiac, in the zodiac, south of the zodiac. Those marked with an asterisk have separate articles. _Northern_ (28). *Andromeda *Cepheus *Hercules Pegasus *Aquila *Coma Berenices Lacerta *Perseus *Auriga *Corona borealis *Leo minor *Sagitta *Booetes *Cygnus Lynx Serpens Camelopardus *Delphinus *Lyra Triangulum *Canes venatici Draco { Ophiuchus *Ursa major *Cassiopeia Equuleus {*Serpentarius *Ursa minor *Vulpecula et Anser _Zodiacal_ (12). *Aquarius *Capricornus *Libra *Scorpio *Aries *Gemini *Pisces *Taurus *Cancer *Leo *Sagittarius *Virgo. _Southern_ (49).