Dr. Morton, in a lecture before the Medical Society of the County of New York, to be printed in the _Medical Record_, related that another promising field of research and application is in the detection of calcareous infiltrations involving, for instance, the arteries, or occurring in the lungs and other tissues. Calculi in kidneys, in the bladder, in the salivary ducts have already been successfully located. The stages of ossification, and the epiphyseal relations of the osseous structure in children may be pictured as is demonstrated in the picture of the entire skeleton of an infant five months of age. The sciagraph shows plainly that it will be possible to detect spinal diseases, either in children or in adults. (_Not reproduced._) 208. NORTON’S EXPERIMENT. DIAGNOSIS. _Elect. World_, N.Y., May 23, ’96.—In conjunction with Dr. Francis H. Williams, Dr. Norton examined several patients from the city hospital to determine how an X-ray diagnosis would agree with that previously made by the hospital staff. (See also § 142, at end.) The outline of an enlarged liver, 7 inches in diameter, was easily distinguished, the two outlines, one by percussion and one by X-rays, agreeing better in favor of the latter by 1/2 inch. An enlarged spleen was perfectly outlined. The tuberculosis of one lung caused it to be more opaque than the sound lung. It was found necessary to take into account the seams of clothing, buttons, buckles, etc. A bullet was found exactly under the spot which they marked as being over the bullet. A foreign metallic body can be easily detected in the œsophagus, because the latter is quite transparent. They could see the shadows of the cartilaginous rings in the trachea, glottis, and epiglottis. Younger persons, up to 10 years of age, are more transparent than older. 209. LANNELONGUE, BARTHELEMY AND OUDIN’S EXPERIMENTS. OSTEOMYELITIS DISTINGUISHED FROM PERIOSTITIS. _Elec. Rev._, Lon., Feb. 14, ’96.—In a sciagraph of a person diseased with the former, the surface of the bone was proved to be intact, while the internal parts were destroyed. In the latter disease the changes proceed from the surface to the interior.