JOSEF MARIA EDER (1855–1944) / EDUARD VALENTA (1857–1937) ,
‘Versuche über Photographie mittelst der Röntgen'sche Strahlen’, Vienna 1896,
15 Photogravures, Vintage, all mounted on thin cardboard, ,
in original map with gravure print, title plate and introduction plates inside,
12 negative facsimiles and 3 positive images,
sizes vary from 7 x 13,8 cm (2.8 x 5.4 in) to 34,5 x 17,6 cm (13.6 x 6.9 in),
Estimate € 30000-35000