Columbia Records introduces the 33 1/3 LP (“long playing”) record at New York's Waldorf-Astoria Hotel[?], featuring 25 minutes of music per side, compared to the four minutes per side of the 78 rpm record, the previous standard.
... for the device's operation, the groove must not be lubricated. The acceleration of the gyroscope is best when the precession of the gyroscope is supported and ...