ing. The only possibility was within the management's office, and Gloria had been in there several times daily since arriving at the es- tablishment. Puzzled, Gloria worked toward the main office, but a suspicious shadow warned her not to proceed further. It was time to get back to the apartment! Gloria painfully retraced her steps, but at one point, she chanced to look down a short hallway that led to a bal- cony overlooking the dance hall. There was a faint greenish-glow coming over the rail of the balcony!

Cautiously, Gloria worked the long way to the railing and peering over it was rewarded by the sight of two persons-one the manager, the other a central-European-ish looking type both crouched over in the cage where the girls played records. As it was barely a dozen feet away, Gloria could see everything plainly in spite of the dim illumination. The two men were bent over a small motor set between one of the two giant turntables. Near them was a record album-one that Gloria knew quite well from having played it-twice that evening, in fact. Puzzled more than ever, she watched as the two men finished some adjustments and placed the record from the album on the turntable, then dropped a tone-arm on it. The soft hum from the giant speakers was only faintly audible as the two men, apparently forgetting that the main sound system was turned on, donned earphones and listened to a voice that rasped out a very long report on a multitude of subjects ranging from the names and crews of nuclear submarines currently re- provisioning in Scapa Flow to the estimated annual harvest of turkeys. As she watched, Gloria suddenly realized how it was done! The record was in fact the same used by herself and the other girls. The difference lay in that the two men had put the tone arm on in the middle! The record was playing backward! Not only that, but a quick check of her senses told her that the sound was not coming from the same sound track. The record had been cut in stereo-in which the impulses and the pickup were impressed along the sides of the V-groove of the rec- ord. This sound was just as obviously monaural, which meant that the impression could be made along the bottom of the V. By playing the track backward, anyone who disregarded the manufacturer's warning about using a monaural needle would be rewarded by a most god-aw- ful screech.

Gloria now knew how--she had a pretty good idea about the other two. Tomorrow, she intended to have a good look at the album to see if there was anything distinctive about it. And to try to make a re- port, if opportunity presented itself. Feeling very proud, Gloria noise- lessly crept back up the hallway, but flushed by success, did not make a

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