Published by L'Academie Royale de Belgique, Bruxelles, 1880
Paperback. Condition: Good +. Paperback. Good plus in original, fragile, blue paper wrappers, some chipping and darkening, rear flap detached but present. Interior is clean, somewhat chipped and fragile. Pages uncut. In French. 20 pp. In wraps Science. SCI/10163.