1891
Copyright PERSEE 2003-2023. Works reproduced on the PERSEE website are protected by the general rules of the Code of Intellectual Property. For strictly private, scientific or teaching purposes excluding all commercial use, reproduction and communication to the public of this document is permitted on condition that its origin and copyright are clearly mentionned.
Louis Jules Gruey, « Mesuré directe de la flexion du limbe d’un cercle méridien par ses propres microscopes », Bulletin astronomique, Observatoire de Paris (documents), ID : 10.3406/bastr.1891.10439