Corrigenda

摘要

In the article on Arc Air Gouging by T. P. Oliver in the October issue we regret thatFigs.3 and 4 were inadvertently transposed.In the article by Dr McCallum,“A Code of Practice for Lead”in the January 1974 issue, the Code of Practice was wrongly attributed to the Department of Health. It was of course produced by the Department of Employm