1882 2, 1 p., small 4to, disbound (no covers). Published in: Comptes Rendus des Séances de l’Académie des Sciences. Vey small chip out of (blank) right margin of first page (not Marey’s paper).In a complete issue (pages 677-752) of the ‘’Comptes Rendus des Séances de l’Académie des Sciences, Séance du lundi 13 mars 1882’’. Contains many other scientific contributions by Berthelot, Huggins, Jourdain, Clémandot, Raffray, Duclaux, etc.This might well be the first mention of Marey’s famous ‘photographic gun’ (’’j’ai réussi enfin à construire, dans le format d’un fusil de chasse, un instrument qui donne aisément douze images successives par seconde’’). In 1890 he authored a well-illustrated, technical book on the flight of birds, ‘’Physiologie du mouvement. Le vol des oiseaux’’, based on photos made with his 1882 invention of the ‘’photographic gun’’.