Röntgen Rays

Röntgen Rays, described by Dr. Knott as “rays of light that pass with ease through many substances that are optically opaque, but are absorbed by others.” “For example,” he says, “the bony structures of the body are much less transparent than the fleshy parts; hence by placing the hand between a fluorescent screen and the source of these rays we see the shadow of the skeleton of the hand with a much fainter shadow of the flesh and skin bordering it.” See Dr. Knott's “Physics.”

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Röntgen, Wilhelm Konrad von * Rooke, Sir George
Romola
Romsay
Romulus
Ronaldshay, North and South
Roncesvalles
Ronda
Rondeau
Rondo
Ronsard, Pierre
Röntgen, Wilhelm Konrad von
Röntgen Rays
Rooke, Sir George
Roon, Count von
Root, George Frederick
Root and Branch Men
Ropemaker, The Beautiful
Rorke's Drift
Rosa, Carl
Rosa, Salvator
Rosamond, Fair
Rosario