Auguste Ernest Paul Laugier, a French astronomer, born in Paris in 1812, died there, April 5, 1872. He was a son of the chemist Andre Laugier (1770-1832), and a brother of the medical writer Stanislas Laugier (1799-1872). He studied under Arago, became connected with the observatory of Paris, and was employed in naval examinations. He was the first to define the proper motion of solar spots. His discovery and calculation of a telescopic comet in 1842 won for him the Lalande gold medal, and in 1843 he succeeded Savary in the academy of sciences, of which he was president for some time. At the request of Humboldt he was engaged for some years in the improvement of the construction of astronomical clocks. In 1853 he made an exact determination of the latitude of the Paris observatory, estimating it at 48° 50' 11.19", differing considerably from the earlier determination of Arago and Mathieu. In 1857 he published a catalogue of the declination of 140 stars, having previously issued one of 53 nebula). He was associated with Arago in researches on the physics of the globe, and in magnetic and photometric labors; and for a long time he made the observations on the declination and inclination of the magnet for the bureau of longitudes.