Music lover found in the long-playing record the answer to their desire to hear a work uninterrupted by record changing. The four fundamental features of the successful long-playing record system are: (1) the slow rotational speed of r.p.m.; (2) finer grooves, usually from 224 to 300 per inch; (3) vinylite plastic record; and (4) lightweight pick-up. The industry had long been seeking a practicable high-quality long-playing record of the normal ten or twelve inch diameter size, but these four features had not been combined until the Columbia Company introduced their long-playing record in 1948.
KeywordsAmateur Cinematography Christian Science Monitor Substantial Salary Vinyl Plastic Sister Organisation
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