syndrome is a small testis, which is the only unequivocal sign always found. Whether this has got anything to do with his liability to all these other disorders I can't say. A lot of neurological and psychological disorders do occur with Klinefelter's syndrome.Professor BOOTH: Finally, I would very much like to thank Professor Henry Miller for coming and exposing himself to this exercise. It is always a problem-the relation between reading a piece of paper and what you see in a patient, and I think for us the tremendous value is to hear a very distintinguished and excellent clinician discussing a problem of this sort. It never matters whether you are right or wrong-what matters is to hear your mind thinking aloud. This has been a tremendous occasion for us, and quite the best Wednesday morning for me for a very long time. We are most grateful to you.We are grateful to Professor J. P. Shillingford and Dr. E. D. Williams for assistance in preparing this report, and to Mr. W. Brackenbury for the photomicrographs.The appointments held by the speakers at the time of the conference are listed below.