Ophthalmoscopy has become a routine procedure in neurologic examinations, and the information thus gathered has been of inestimable service in the diagnosis and therapeutics of nervous diseases in general. In the solution of the special problem of tumors of the brain, however, ophthalmoscopic examination has been less serviceable; while it has indicated the presence, it has done little to establish the localization or the type of such neoplasms.
If ophthalmoscopy was to furnish this much-desired information, thorough, comprehensive study was necessary of the ophthalmoscopic pictures and their relation to the character, location, and size of the new growth within the cranial vault; and fortunately such study has been made. In a comparatively recent paper1 Leslie Paton has presented a most thorough and interesting analysis of about four hundred cases of brain tumor from the records of the National Hospital for Paralyzed and Epileptic in London. A feature which gives