An Atmosphere on Ganymede from Its Occultation of SAO 186800 on 7 June 1972

On 7 June 1972 the third , Jovian satellite Ganymede occulted the eighth-magnitude star SAO 186800. Successful photoelectric observations obtained at Lembang, Java (Indonesia), and Kavalur, India, show nonabrupt immersions and emersions, indicating the presence of an atmosphere whose surface pressure is greater than about 10(-3) millibar. By fitting the two occultation durations as chords to a model disk, the diameter is found to be 5270 (+30, - approximately 200) kilometers, the major error contribution arising from the uncertain atmospheric thickness below the occultation layer. The derived mean density is 2.0 (-0.03, + approximately 0.2) grams per cubic centimeter.

Movement of sodium and cholesterol across porcine aortic intima

1. A method for measuring the movement of substances across porcine aortic intima in vitro is described.

2. The rates of movement of sodium and cholesterol were decreased by adding dinitrophenol to the bathing solutions and increased by adding adrenaline.

3. The relevance of these results to hypertension and atheroma is mentioned.

4. The possibility of active transport of sodium and cholesterol is suggested.

TRAUMATIC ARTHRITIS OF THE KNEE AND ITS EFFECTS

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A Case of Fusion of the Semilunar and Cuneiform Bones (Os lunato-triquetrum) in an Australian Aboriginal

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