CORNU, Alfred. Mémoire sur la détermination de la vitesse de la lumière entre l'observatoire et Montlhéry, par M. A. Cornu. in Annales de l'Observatoire de Paris, publiées par U. -J. Le Verrier - Mémoires - Tome XIII. 1876.

First edition.

Alfred Cornu (1841-1902), is famous for his three measurements of the speed of light between 1872 and 1874, made with the method of Fizeau for which he had great admiration.
The last and the best was done between the Observatory and the Montlhéry Tower. This article of 315 pages, is devoted to this last experiment.
The article "Recherches sur les observations magnétiques faites à l'observatoire de Paris de 1667 à 1872", by M. G. Rayet is bound in at the end of the volume.