Boys; Boy Scouts; Buildings; Motion picture theaters; People; Photographs; San Jose (Calif.); Santa Clara County (Calif.)--History;
Black-and-white photograph of Boy Scouts promoting Penrod, the movie in front of a theater. Rudolph Valentino in "Moran of the Lady Letty" also playing at theater.
Crova's apparatus was designed for the purpose of representing vibratory movements on the screen, with 8 disks. Turning the crank past a vertical slit caused the disks to rotate, while a beam of light from the optical system impinged on the slit...
