It was in a studio that the eruption of Mount Etna was manufactured. The promoters had tried taking real moving pictures of the volcano in eruption, but they were not nearly as good as the studio-made variety. These had the verisimilitude of real life, with fleeing thousands, men, women, children, and animals, pouring down its red-hot sides. The films of the fleeing people were merely super-imposed on the film of the fake volcano, studio made. You have seen your favorite heroine jump unhesitatingly off a tall cliff? Or swim an ice-choked river? You never knew she could swim. Nor does she. Another movie trick is what you have seen. Movie stars seldom do such things. Professionals, dressed exactly as they are, and made up to resemble them, do this part of the stunt for the real actors. Jumping from a burning building is another movie feat which is only a trick. The real people get only as far as the windows. Dummies do the jumping and the falling. So! But how do they make inanimate objects move about as if they were endowed with life? How does a catsup bottle jump up from the table and climb down to the floor on the rungs of a chair? Or how can grandpa’s clock walk up the stairs, turning around solemnly the while to look you straight in the eye and give you warning of the flight of the hours? Perhaps you have seen horses running full tilt at you and never seemed to catch up. So simple! Right in front of the horses is a high-powered automobile, in which the movie camera is set up. The horses follow the car, and the camera man grinds out his film, always keeping a few feet ahead of his charging subjects. Prehistoric Man Now Seen in Wax. The three great links in the chain of human ancestry in America, beginning nearly twenty thousand years back, have just been represented for the first time in scientifically reconstructed wax faces at the College of Medicine, University of Nebraska, in Omaha. This is the first reconstruction work of the kind that has been done on prehistoric skulls of America. Scientists are enthusiastic over the three great types it has brought out on the skulls of modern Indian, the cave-dwelling cannibal of three thousand years ago, and the Nebraska “Loess man,” fragments of whose skull were deposited with the glacial drift when the Missouri River bluffs were made, between ten thousand and twenty thousand years ago. For eight years the skulls of the low-browed Loess man, found by the archeologist, Robert F. Gilder, of Omaha, have remained in the museums in Omaha, Lincoln, and at Harvard University, while science has hopelessly longed to know what a face this preglacial man must have worn.