Society of Motion Picture Engineers : incorporation and by-laws (1919)

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Lantern Slide (see slide) — The transparent picture from which a lantern picture is projected. Leaders — That piece of blank film attached to the beginning of the picture series. Light Beam — A bundle of light rays. Light Ray — A thin line of light. Location — Any place selected for the action of an outdoor scene. Magazine Valve — The film opening in the magazine of a motionpicture projector. Masks — Opaque plates of various sizes and shapes used in the camera to protect parts of the negative from exposure. Motion-Picture — The synthesis of a series of related picture elernents, usually of an object in motion. Motion-Picture Film — The ribbon upon which the series of related picture elements is recorded. Motion-Picture Projector — An optical lantern equipped with mechanisms for suitably moving motion-picture film across the projected light. Movies — Motion pictures. Multiple-Reel — A photoplay of more than a thousand feet of film in length. Negative — The developed film, after being exposed in a camera. Negative Stock — Light sensitive film intended for motion-picture camera use. Objective — The picture-forming member (lens) of the optical system. Optience — A collection of persons assembled to see motion pictures. Pam — Contraction for panorama. Panoram — The act of, or device for, turning a motion-picture camera horizontally, to photograph a moving object, or to embrace a wide angle of view. Photoplay — A story in motion pictures. Positive — The developed film, after being printed through a negative. Positive Stock — The light-sensitive film intended to be printed upon through a negative. Pre-Release — A picture not yet released for public showing. Print — Same as "positive." Producer — The maker of photoplays. Program — The complete show for a single optience. Props — Contraction of properties. Objects used as accessories in a play. Projection Distance — The distance between the objective and the screen of a stereopticon lantern or motion-picture projecting machine. Projecting Lens — Properly called projection objective. Projection Objective — The objective which forms an image of the lantern slide or film, upon the screen. 9