These days, so many movies rely on special effects to draw in and dazzle audiences. But onscreen effects are not late-20th or early-21st-century phenomena. For indeed, they have evolved across the decades. You can go back to the 1930s, for example, and marvel at the effects employed in such classic films as SAN FRANCISCO, THE GOOD EARTH, and the original KING KONG. Respectively, they feature eye-opening images of Clark Gable and Jeanette MacDonald surviving the 1906 San Francisco earthquake; Paul Muni, Louise Rainer, and a locust plague in China; and, most famously, the title ape toying with Fay Wray while cavorting atop the Empire State Building.