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The temptation to skimp examinations and maintenance procedures, to save time or overcome staff shortages, must be resisted, and supervisors must insist on strict adherence to maintenance schedules and quality of workmanship.

The nest centre is the site of the female role par exellence as the copulatee.

A friend, who was specially interested in such studies, having captured a spider, erected a column in a basin filled with water; and placing his spidership on the top of the column, sat down to watch results.