"I am not a prophet, and I am opposed to prophesying. I am pursuing my investigations, and as fast as my results are verified I shall make them public."

“Having discovered the existence of a new kind of rays, I of course began to investigate what they would do. … It soon appeared from tests that the rays had penetrative power to a degree hitherto unknown. They penetrated paper, wood, and cloth with ease; and the thickness of the substance made no perceptible difference, within reasonable limits. … The rays passed through all the metals tested, with a facility varying, roughly speaking, with the density of the metal. These phenomena I have discussed carefully in my report to the Würzburg society, and you will find all the technical results therein stated.”

“Annotated bibliography for Wilhelm Rontgen from the Alsos Digital Library”

“The New Marvel in Photography, an article including an interview with Röntgen, in McClure's Magazine, Vol. 6, No. 5”

“We shall see what we shall see. We have the start now; the developments will follow in time.”

“Röntgen Rays: Memoirs by Röntgen, Stokes, and J.J. Thomson”

“Röntgen Memorial in Würzburg where he discovered the x-rays”