Røntgens Straaler : en Fremstilling af de elektriske Straalefaenomener
A Danish popular-scientific account of Röntgen rays and electrical discharge phenomena, published in Copenhagen by Gyldendal in 1896 for general and student readers soon after X-rays were announced. The 19 wood-engraved figures show lettered vacuum tubes, Crookes and Geissler bulbs, mercury pumps and stippled diagrams of wave fronts and cathode streams, useful as line-art apparatus silhouettes and radiating-arc patterns.
