3. Is there any significance in the story, if true, that Phillips acquired his syphilis from a Mongolian? It seems to be fairly well established that syphilis of the nervous system is extremely rare in China and Japan, whereas bone syphilis is very frequent there. It has been held that this has to do (_a_) with strains of spirochetes, (_b_) with the state of civilization, or (_c_) with the degree of “syphilization.” Apparently when a race is first infected with syphilis the lesions are chiefly of the cutaneous and osseous systems; only in later generations the vascular and nervous systems suffer. However, involvement of the nervous systems of Mongolians resident in this country is no rarity, a point possibly in favor of the theory of special strains affecting the nervous system as prevalent in western countries. Little or nothing is known as to the effect of transmission from one race to another, as from Mongolian to Caucasian in Phillips’ story. =NEUROSYPHILIS is NOT to be entirely ruled out by a negative serum Wassermann Reaction; for the fluid Wassermann Reaction may be positive.= =Case 13.= William Twist is a case of note in the matter of the so-called preparetic period (the idea of Charles L. Dana which was scoffed at when first proposed by him in 1910). The patient, a very successful traveling salesman, 35 years of age, was admitted to the Psychopathic Hospital showing a typical picture of general paresis. Thus, =mentally=, the patient showed elation, grandiosity (millions of dollars to give away), intellectual weakness, disorder of memory, lack of judgment, rambling talk, speech defect, omission of letters in writing and spelling. =Neurologically=, there was tremor of the lips, slight irregularity of the pupils, which however reacted well, and lively knee-jerks. Mr. Twist had sought advice at our out-patient department in his thirty-third year. The records show that at that time he was somewhat depressed, and his speech was even then, according to his own statement, stammering. However, we found the W. R. at that time to be negative in the blood serum. It appeared that his mother had died of consumption; his father was said to have committed suicide. A brother had once recovered from an attack of depression, presumably an attack of manic-depressive psychosis. Accordingly, we thought at the time that the case was probably one of manic-depressive psychosis. Moreover, our routine serum W. R. failed to indicate any syphilitic process. As for the so-called stammering of speech, this appeared to be a matter of the patient’s own recollection rather than of our observation. In any event, the patient had gone into the country and appears to have entirely recovered; falling, again, however, into mental difficulties after a short period, and finally arriving at the hospital in the above-mentioned classical condition.