Berliner Gramophone formulations remained the standard disc record material until the first vinyl records – initially made only for radio use and other special applications – were introduced in the 1930s. Beginning in 1896, Berliner's gramophones were made by Philadelphia-based machinist Eldridge Johnson, who added a spring motor to drive the previously hand-rotated turntable. Berliner also opened an office in New York City, staffed by Frank Seaman and O. D. LaDow and organized as the National Gramophone Company. Master recordings were made onto zinc plates, which were then electroplated and a negative-image "mother" made from them to stamp discs. A major reversal
That's What Love Is Made Of at the concert, as she had retired from onstage and TV performances earlier that year for family reasons after touring caused her to have miscarriages, but she continued singing on their records as a non-touring member of The Miracles. The Miracles' "That's What Love Is Made Of" has inspired cover versions by Michael Jackson, Bobby Vee, Choker Campbell, and The Magicians, and has appeared on many Miracles "Greatest Hits" albums and CD Anthologies. The song's flip side was the popular regional Miracles hit tune, "Would I Love You", which was included on "Greatest Hits from the Beginning" but did not