Educational screen & audio-visual guide (c1956-1971])

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LIGHT CONTROL TO SUIT ANY PROJECTOR OR SUBJECT Only a Venetian blind built specifically for audio-visual purposes can give you perfect light control at all levels. Levolor AudioVisual Blinds are in use in thousands of schools and universities for audio-visual purposes. They enable the instructor to change the ambient light to suit any projector, subject, or student activity. Write for Levolor's invaluable survey reporf'How Dark Should Audio-Visual Rooms Be?" No charge or obligation. Write to Audio-Visual Dept., Levolor Lorentzen, Inc., 720 Monroe St., Hoboken, N. J. *"»(( *<>o«i, •t Be sure to specify The Scientifically Developed Audio-Visual Blind COPYRIGHT: LEVOLOR LORENTZEN. INC. EdScreen & AV Guide — December, 1958 603