Author: LUCAS J.D. s.j. - Röntgen :
Title: Conditions de perfection des silhouettes Röntgen et étude de l'efficacité actinique des diverses régions du tube de Crookes.
Description: .: 2. Brussels, Royal Academy (Academie royale de Belgique), 1896, in-4°, 8 pp + 5 plates, published as a treatise in the yearbook of the Academy (Volume LV), loose, no wrappers (in need of a binding, removed from the yearbook). (Early publication on X-rays , photography, illustrated with 5 illustrations in photo collotype made by A.J. Kymeulen ). .

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