IT is a pleasure to have the opportunity of reviewing a Government Publication which is a report to the Minister of Labour and National Insurance, Northern Ireland, by the Department of Social and Preventive Medicine of Queen's University of Belfast. It is the story, clearly and succinctly narrated, of a scientific survey into an important industrial hazard by Professor Pemberton and members of...

When arguments are repeated in a procedure call, aliasing arises and plays havoc with specification and reasoning. To prevent this aliasing, which renders the semantics of a language unclean even when all other sources of aliasing are avoided, we propose a simple new scheme for parameter passing that uses initial values for passing second and subsequent repeated arguments and localizes the effe...

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