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This monograph is based on the material of thirty-four cases observed by the author. It may be regarded as a continuation of the studies of Cushing and of Elsberg on the same subject and follows them almost point for point. A large number of excellent histories are given in detail and are well illustrated with photographs, graphic drawings, roentgenograms and diagrams. There were in this series an astonishing number of bilateral meningiomas—in all, thirteen—communicating with each other through the falx cerebri and sometimes through the sinus. In several instances the sinus was obliterated by the tumor. The characteristic changes in the overlying bone and in the vessels are well described and illustrated.
The chapter on pathology is contributed by Henschen and contains some striking illustrations of villous projections of tumor through the dura. The description of the symptomatology and of operative technic appears sound, but is not particularly new. In