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Military pilot selection is a complex task involving huge cost in financial and human terms. In the United Kingdom, training a fast-jet pilot costs an estimated 3 million pounds and takes 3 years. Consequently, it is necessary that the training success rate be maximal, since failure not only represents financial loss but also wastage of human resources. Effective selection for flying training would be of special advantage at present, as the operational repertoire of military aircraft moves forwards. Personality-based selection appears to have limited value. Analysis of certain objective aptitude tests and monitoring of the learning curve appear more promising. The alternative of acquisition of flying skills through actual or simulated flying experience seems an expensive option. This paper reviews the development of selection methods and concentrates on those of current interest. Civilian aviation and other professional selection systems might also benefit from the military endeavors. The most exciting development is the linkage of computer technology and aptitude tests.

A 27-year-old woman with a post-partum psychosis developed NMS which proved difficult to diagnose because of the organic features of the presenting illness. Possible contributory factors to the development of NMS included exhaustion, a non-specific viral illness, and rapid loading with haloperidol.

Pesticides provide important benefits in agriculture and public health [1,2] and the balance of evidence shows that these chemicals are not producing an epidemic of poisoning[1,3–6]. However, some aspects of present hazard evaluation procedures can be criticized.

The epitheloid cells forming the granulomata of Crohn's disease show striking vacuolation from the coalescing of pinocytotic vesicles with double membrane-bound bodies and their subsequent fusion with lysosomal dense bodies. The fine detail of the granulomata in each individual is uniform but varies from case to case in such a way as to suggest an episodic stimulation of pinocytosis and vacuole formation. The production of such granulomata with these cyclical appearances is consistent with an intermittent stimulus by exogenous antigen or antigen antibody complexes arriving in the diet.