The hazards of rehabilitation.

Falls are the most common accident occurring to patients in hospital, especially those undergoing rehabilitation. The types, causes, and consequences of such falls are discussed in relation to the patients' age and underlying condition with reference to 386 accidents occurring over a 5-month period in a hospital with 50% geriatric beds. Measures that may reduce the hazard to the patient and minimise the risk of accidents in hospital are suggested.

Tectonics of the Middle America trench offshore Guatemala

A geophysical and geological survey conducted over the landward slope of the Middle America Trench offshore Guatemala has revealed lanward - dipping reflectors which are associated with high compressional wave velocities, large magnetic anomalies, and basic/ultrabasic rock. Multifold seismic reflection data reveal that the edge of the continental shelf is a structural high on which Cretaceous and younger sediments of the shelf basin onlap and pinch out. The upper part of the continental slope is covered in most places by a 0.5 to 1.0 km thick sediment apron with seismic velocities of 1.8 to 2.6 km/sec. Immediately beneath the sediment apron an irregular surface is the top of an interval with velocities of 4.3 to 4.7 km/sec. Within this interval landward - dipping reflections are traced to about 6 km below sea level. Above this zone of dipping reflectors two positive magnetic anomalies are observed as well as a positive gree - air gravity anomaly reported by other workers (AU)

Deep seismic reflection results from the gulf of Mexico: part I.

Deep sounding seismic reflection data show undeformed reflectors at depths down to 11 kilometers beneath the continental rise and abyssal plain and 7 kilometers in basins of the lower slope. Weak reflectors are visible beneath the salt of the Sigsbee Scarp and within salt ridges separating the lower slope basins.

Apollo 17 seismic profiling: probing the lunar crust.

Apollo 17 seismic data are interpreted to determine the structure of the lunar crust to a depth of several kilometers. Seismic velocity increases in a marked stepwise manner beneath the Taurus-Littrow region at the Apollo 17 site. A thickness of about 1200 meters is indicated for the infilling mare basalts at Taurus-Littrow. The apparent velocity is high (about 4 kilomleters per second) in the material immediately underlying the basalts.

Apollo 14 active seismic experiment.

Explosion seismic refraction data indicate that the lunar near-surface rocks at the Apollo 14 site consist of a regolith 8.5 meters thick and characterized by a compressional wave velocity of 104 meters per second. The regolith is underlain by a layer with a compressional wave velocity of 299 meters per second. The thickness of this layer, which we interpret to be the Fra Mauro Formation, is between 16 and 76 meters. The layer immediately beneath this has a velocity greater than 370 meters per second. We found no evidence of permafrost.

Two cases of cryptococcal meningitis, one treated with 5-fluorocytosine.

Cryptococcal meningitis occurred in two patients in the North of England. One, an elderly woman who was ill for 12 months with an obscure indolent meningitis until use of steroid drugs resulted in an acute exacerbation during which cryptococci were isolated, was treated successfully with amphotericin B. The other, a student from New Guinea with subacute meningitis, could not tolerate amphotericin B but responded to two courses of oral treatment with 5-fluorocytosine 100-200 mg./kg./ day without any appreciable side-effects. Further trials of this drug in the treatment of cryptococcosis are recommended.