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The superconducting to normal transition in thin films of Al, Sn, In, and Pb has been studied by applying square voltage pulses to a coaxial line terminated by the film and observing the reflected pulse shape. Interest has centered on the nearly isothermal transitions which could be induced below the lambda temperature of liquid helium. The results have been analyzed in terms of the nucleation and growth of normal domains. The use of very rapidly rising pulses has allowed an estimation of the nucleation time of a normal domain as not more than 3 × 10−10 second. The number of nucleation sites was a sensitive function of the current density in the film. The subsequent growth of normal domains proceeded with a velocity characteristic of the material, of the order of the velocity of transverse sound waves in the bulk metal. Roughly the same velocity was deduced for normal domain growth both parallel and perpendicular to the direction of the current in the film. Growth velocities smaller than these have not been observed, but the "pinning" of domain boundaries by defects in the film has been encountered.

Fifty‐four naive observers were asked to report whether they could hear a difference between two successive tones which differed only in respect to which ear was leading in phase angle. They were not given specific suggestions to listen for a particular effect, but were later asked what they had heard. Two intensities, eight frequencies, and seven phase leads were used. The major conclusions from the results are: (1) All observers heard differences due to phase and identified the differences as localization, although for most the localization was in terms of which ear was stimulated rather than in terms of apparent localization of a sound source. (2) Pitch and loudness differences also occurred, but cannot be explained on the assumption that only one ear was effectively stimulated. (3) Measures of phase‐difference thresholds, upper frequency limits, and time‐difference thresholds show approximately the same results as are obtained with other methods.

Not uncommonly, schizophrenia seems to arise in close connection with the puberal years. This is sometimes attributed to psychological or physiological stresses at puberty, but there is no really adequate understanding of the phenomenon. One cannot predict at all dependably which personality characteristics or which stresses will result in a schizophrenic breakdown near puberty.

Three hundred thirty-six patients with severe coronary artery disease were operated upon between June, 1969, and December, 1974. All were followed from 1 to 66 months (average, 37 months) with respect to survival and late myocardial infarction. The patients operated upon were compared statistically with a group of unoperated patients, and this evaluation demonstrated significantly better late survival in the surgically treated patients who had double- and triple-vessel disease. Two hundred thirty-six consecutive patients had clinical and late arteriographic reevaluation more than 6 months postoperatively; 78% were asymptomatic. Factors affecting graft patency are reviewed in detail. Late graft patency is determined by preoperative selection of vessels for grafting. Patency is not an index of success for this procedure. Surgical therapy appears to be the treatment of choice for patients with two- three-vessel coronary occlusive disease.

This paper might have been more accurately entitled "An Unusual Complication of the Twist," for it was shortly after doing "the twist" that the patient began to complain of pain in the popliteal fossa. Arterial aneurysms of the lower extremity occur infrequently. Mills, at the Mayo Clinic, reported an incidence of only 3.5% in 396 cases of aneurysms. 1 Even so, the popliteal artery is the vessel most commonly the site of peripheral aneurysm formation. 2 The commonest etiologic factor in such aneurysms is arteriosclerosis. 3 In 100 cases reviewed by Gifford, Hines, and Janes, 4 32 cases were associated with arteriosclerosis, 3 with syphilis, 1 with mycotic infection, and 1 with trauma. No case of popliteal aneurysm associated with osteochondroma or exostosis of the femur was reported by this group of investigators. Brailsford, 5 in his radiology textbook, makes references to a case; however, a detailed case report does

It seems clear that rheumatic fever can involve the nervous system. Chorea is the most commonly recognized form of such involvement, but neurological symptoms suggestive of meningitis and encephalitis 3 as well as psychological symptoms 13,37 have also been observed. For nearly a century the literature has recognized the occasional presence of psychosis as an apparent symptom of rheumatic fever, 31 and from time to time the similarity of some of these psychoses to schizophrenia has been remarked. 4,19,23,27,31 The evidence of the present study suggests that far more may be involved than an occasional resemblance between rheumatic brain symptoms and schizophrenia. The hypothesis tested and supported here is that a large portion of schizophrenics, including many who present a typical schizophrenic course and symptomatology with no outstanding organic symptoms and no traditional signs of rheumatic fever , may nonetheless actually have psychoses

To our knowledge, thrombosis and occlusion of the superior vena cava have not been previously described complications of permanent transvenous endocardial cardiac pacing. We have successfully managed such a case without surgery.

SPONTANEOUS extravasation of chyle into the free peritoneal cavity is uncommon, but even more uncommon is the finding of chylous ascites following trauma. The rarity of this entity is emphasized by the discovery of only seven reported cases of traumatic chylous ascites in the world literature (Table). There is little doubt in the minds of the authors that more cases than these must occur, but they go either unrecognized or undiagnosed. It thus appeared worthwhile to draw attention to this unusual clinical entity by setting forth the facts concerning this eighth case of traumatic chylous ascites which occurred in a 26-month-old child. Further, this case serves to illustrate that the diagnosis can be made preoperatively and that early surgical intervention is appropriate and desirable. Report of Case A 26-month-old white boy was transferred to the US Naval Hospital, St. Albans, NY about 24 hours following injury. Allegedly, his 4-year-old sibling