Elmtown's youth—the impact of social classes on adolescents

With million-volt x-rays on Kodak Industrial X-ray Film, Type M, the base of this dense casting shows fine structures that add up to a gross defect. The high contrast and low graininess of this film show clearly the character of the defect. At250 kv, aradiograph on Kodak Industrial X-ray Film, Type M, shows a threadlike structure extending from a cavity near the end of the vane. Here, too, high contrast and low graininess are essential,yetthefilmhasadequatespeed for reasonably short exposure.