Sight & Sound

Millions of U. S. citizens have heard the thunderous "Voice of the Sky" booming advertising sales-talk down from above. Millions more have read the advertising slogans which blaze in 6-ft. Neon letters from the underwing of another huge plane. Lately at a Long Island airport the stupendous vocal cords of the "Voice of the Sky" were extracted from its old plane and grafted into the Neon-light plane. Last week the grafted ship was put through dress rehearsals over Manhattan & vicinity.

The combined sight & sound advertising mechanism is owned and operated by Plane Speaker Corp.. whose president is famed Charles Lanier Lawrance. designer of the Wright Whirlwind engine. The talking sign-carrier is a five-year-old bomber which boasts the largest wing- area in the U. S. Its new generators can produce enough current to light 100 small homes. Its loudspeaker is 1.600,000 times as loud as the human voice. Its reverberations can kill butterflies, stun birds. Its five operators and pilots converse inside the cabin only by telegraph.

When the "Voice of the Sky" was new, it charged advertisers $2.000 per display hour. The sign-carrying plane alone got $750. The combined apparatus may now be hired for $250 per hour. First to do so was Gold Dust Corp. From the dark skies the plane bellowed forth a musical program while its ruby letters flashed the alternating lines:

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