Xerotic

{ze-rotf-ik) [^>/pof, dry]. Characterized by xerosis; dry. X-rays, or Rontgen -rays. The peculiar ether-rays or waves discovered by Prof. Rontgen of Wiirzburg. A vacuum-tube of gla (called a Gei ier Tube, a Hittorf s or a Crookes1 Tube) is used with two wires sealed through the gla . These wires are connected with the two poles of a battery, and Rontgen found that the rays from the cathode {Cathode Rays) had peculiar penetrative powers through matter opaque to other ether-rays, and by means of these rays photographs (“Shadow grams”) may be taken of bones, metallic substances, etc., situated in the ti ues. Herz, and especially Lenard, prior to Rontgen, had discovered this penetrating power of the cathode rays, but failed to make the application suggested by Rontgen. 667