This is the first book regarding the cerebrospinal fluid to be published in English since Merritt and Fremont-Smith's volume appeared in 1937. Lups and Haan's work would accordingly be of value for this if for no other reason. It is regrettable that the translation tends to be literal and as such lacks felicity. In some instances the awkwardness of expression and quaint terminology serve to confuse, although this is exceptional. It is surprising, for example, to read (following a proper description of the aim of Queckenstedt's maneuver): "It is also possible in this way to diagnose tumors of the fossa cerebellaris." While the statement is undoubtedly correct, the use of the procedure in the presence of a neoplasm of the posterior fossa is so manifestly incorrect that the inclusion of the statement is unwarranted. The book is well-planned, and anatomic, physiologic, clinical, and technical topics are dealt with in a