Australopithecine endocast (Taung specimen, 1924): a new volume determination.

A redetermination of endocranial volume of the original 1924 Taung australopithecine described by Dart indicates a volume of 405 cubic centimeters, rather than the 525 cubic centimeters published earlier. The adult volume is estimated to have been 440 cubic centimeters. This value, plus other redeterminations of australopithecine endocasts, lowers the average to 442 cubic centimeters, and increase the likelihood of statistically significant differences from both robust australopithecines and the Olduvai Gorge hominid No.

Effect of chest physiotherapy on blood gases of neonates treated by intermittent positive pressure respiration.

The effect of standardized chest physiotherapy and hyperinflation on the blood gases of neonates being treated for tetanus by intermittent positive pressure respiration was investigated. It was found that physiotherapy and suction to remove secretions did not improve oxygen pressures but produced a small drop in both Paco and Pao. This was associated with a widening of the alveolar to arterial gradient for oxygen.

The design and preparation of induced transmission filters.

Induced transmission (IT) filters are compared with other types of narrow-band filters and their advantages outlined on the basis of a general expression for spectral transmittance. A method of design is described which avoids the use of admittance charts and can be applied to optimize the performance of an IT system at various stages during its preparation. Finally, methods of monitoring are discussed with emphasis on the theory of a technique particularly useful for IT filters for the ir.