CHAPTER XII.

151. Sciagraphic Plates Combined with PUPIN, Fluorescent Salts. SWINTON, and HENRY.

152. Penetrating Power of X-rays Varies with THOMPSON, S. the Vacuum. P.

153. Reduction of Contact Potential of MURRAY Metals by X-rays.

154. Transparencies of Objects to X-rays Not NODON, Influenced by the Color. Detected by LUMIÈRE, Simultaneous Photographic BLEUNARD, and Impressions. LABESSE

155. Chlorine, Iodine, Sulphur, and MESLANS, Phosphorus Combined with Organic BLEUNARD, and Materials Increase Opacity. LABESSE

156. Application of X-rays to Distinguish BUQUET, Diamonds and Jet from Imitations. GASCARD, and THOMPSON, S. P.

157. Inactive Discharge Tubes Made Luminous DUFOUR by X-rays.

158. Non-refraction in a Vacuum. BEAULARD

159. Bas-relief Sciagraphs by X-rays. CARPENTIER and MILLER

160. Transparency of Eye Determined by WUILLOMENET Sciagraph of Bullet Therein.

161. Mineral Substances Detected in RANWEZ Vegetable and Animal Products.

162. Hertz Waves and Roentgen Rays Not ERRERA Identical.

163. Non-mechanical Action by X-rays GOSSART Determined by the Radiometer.

164. X-rays within Discharge Tube. BATTELLI

165. Combined Camera and Sciascope. BLEYER

166. Non-polarization of X-rays. THOMPSON, S. P., MACINTYRE

167. Diffuse Reflection. Dust Figures THOMPSON, S. Indirectly by X-rays. P.

168. Continuation of Experiments in § 113. LODGE

169. Thermopile Inert to X-rays. PORTER

170. Non-diffraction of X-rays. MAGIE

171. Resistance of Selenium Reduced by GILTAY and X-rays. HAGA

_Total number of sections to this place, 199._