“…Yet Bailey, head of the department of neurosurgery at the University of Chicago, for years his assistant, frequently resorts to 4 In my opinion, both those who say that seldom or never should lumbar punctures be used and those who say they should be used as a routine are wrong. There is a middle ground, however : There are cases in which this procedure is definitely indicated and of the greatest value, but it should be used only in those cases.…”