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._ CHAPTER XIII. 200. Needle Located by X-rays and then HOGARTH Removed. 201. Needle Located at Scalpel by X-rays and SAVARY then Removed. 202. Diagnosis with Fluorescent Screen. RENTON and SOMERVILLE 203. Bullet Located by Five Sciagraphs. MILLER 204. Bones in Apposition Discovered by MILLER X-rays and afterward Remedied by Operation. Other Cases. 204_a_. Necrosis. MILLER 205. Application of X-rays in Dentistry. MORTON 206. Elements of the Thorax. MORTON 207. A Colles’ Fracture Detected by X-rays. MORTON 208. Motions of Liver, Outlines of Spleen, MORTON and and Tuberculosis Indicated. WILLIAMS 209. Osteomyelitis distinguished from LANNELONGUE, Periostitis. BARTHELEMY, and OUDIN. 210. Concluding Miscellaneous Experiments ASHHURST, Relating to Similar Applications of PACKARD, X-rays. MÜLLER, KEEN, and MORTON, T. G. CHAPTER XIV. Theoretical Considerations, Arguments, and Kindred ANTHONY Radiations. ------------------------------------------------------------------------