3. What is the behavior of the serum W. R. and the spinal fluid W. R. under systematic treatment? Sometimes, as in this case, the serum W. R. remains positive and the fluid W. R. becomes negative; but in other equally well-defined cases, the reverse holds true, and the serum W. R. reaction becomes negative whereas the spinal fluid reaction remains positive. The obvious conclusion is that we cannot always be sure even by faithful tests of either the serum or the fluid alone, whether the treatment has succeeded in abolishing the laboratory signs. 4. Can this case be regarded as one of cure? Not by the definition adopted in this book or by the syphilographers who take into account not only the nervous system but the body which contains it. To be sure, the spinal fluid of Agnes O’Neil is now entirely negative and she is clinically free from symptoms; yet from the broad standpoint of syphilis therapy in general, this patient is not cured, as is evidenced by the positive serum W. R. =PARETIC NEUROSYPHILIS (“general paresis”) is often marked by SEIZURES.= =Case 20.= Lester Crane, a plumber, 37 years of age, came to the hospital with a slow and defective speech. Moreover, there seemed to be some mental disorder since his answers to questions were not always relevant. It appeared that he was seeing bugs on the wall. =Physically=, Crane was a well developed and nourished man, with overactive knee-jerks and a Babinski reaction on the left side. It developed that there was an impairment in hearing. The pupils reacted well both to light and to distance. The patient was very restless and smiled in a silly fashion. His memory was decidedly defective in all spheres, and he was very slow in the intake of ideas. The plumber’s wife said that, at about the age of 23 or 24, he had a spell of confusion lasting two or three days, with peculiar conduct, unintelligible talk, and a good deal of weeping. The medical diagnosis at that time took into account the fact that Crane was a plumber and was “lead encephalopathy.”