The Abstract which has been made embraces fifteen hundred and sixty-five cases, and extends over a period of eleven years. Most of the autopsies, that is, the cerebrospinal portion of them, were performed by Sir J. Crichton-Browne, Drs. Herbert Major and Bevan Lewis. Such statements therefore as are made may be accepted as faithful representations of the existent conditions so far as means allowed. It must be premised that, although the reports show evidence throughout of careful and conscientious work, and mostly are very full and embracing, yet there is some indefiniteness conferred by the absence of an exact and systematic method in their compilation. Nevertheless, it must not be supposed that such was always omitted; but that often where special lines of investigation have been pursued the results have not been incorporated in the records.