Lawyers, with their constant opportunity for parctive, show a talent for public oratory that few dictors canequal. However, the physician, despite his more modest and hesitant delivery, has one great advantage over themost experienced lawyer. He is allowed to use slides. Slides of good quality conceal defects in oratory and theymake for a confident speaker and a contented audience. By contrast smudged, complicated or ill-prepared slides maydraw attention to minor defects in delivery and make the audience inattentive.